Hair Drug Testing Window

What is a database? All of us being in the software industry are aware of this but just to reiterate, it is basically an integrated collection of data and its an integral part of our application. All our application data is stored and fetched from a database. A testers job can become more interesting if testers have access to the database which plays an important role in Software Quality Testing process and can increase enormously in a small window of QA testing time.
During my experience with an Independent Offshore software testing organization, I have had many opportunities to work on projects wherein our trusted clients had provided us database access. However, you cannot expect every client to lend you access to their databases; but this does not mean that we cannot perform quality testing without it. But, having the database access would surely widen the testers perspective and would be very certain while performing requirement based testing. Believe me; an easy access to a database makes the whole testing process easier and more importantly efficient. Let's see the following instance wherein database access plays a vital role in QA Testing phase and providing reliable software testing services.
Suppose you have been provided with a requirement to verify the search result's count.
For this case, manually counting and verifying the results is feasible only when a small number of results is returned. However; if in case the result set is large, verifying using a manual count would neither be a feasible task nor an efficient execution method. In this situation, one would either verify the search results randomly or look out for some other efficient method. When verifying the records randomly, you cannot be assured if the requirement is working correct for all the values and inputs. So, here if we have the access to the almighty database, we can verify the count by writing simple SQL queries that can do the job not only in an easy manner but also in a far more efficient manner and moreover, we can rely on results returned from the database.
Apart from the cited instance, database can be used in various other ways to rescue a tester out of tough waters. Some of them being:
Helping a tester find the exact root cause of an issue
Helping save QA Testing time
oInstance: Sometimes we need test data, which is difficult to create or find in the application; databases can be very useful here. One can easily query the data and fetch what is required. Hence, a lot of QA time is saved in searching the particular test data.
Getting into the depths of the application which will automatically help us test each and every aspect of the application

All in all, database access is always a great asset to have in a tester's armory as it opens a number of doors for discovering those hidden bugs; while allowing a tester to apply scenarios even at the lowest level of the application, i.e. at the data level. However, smart testers can still device ways to give quality output even without direct access to the database.

Frequently Asked Questions

  1. QUESTION:
    Help with hair folical testing!?
    I need to know how far back an employer can go when testing the hair for drugs. I've heard it is just 3 months but my sister in law is saying as long as the hair is. Do you know how far back they usually test. This wouldn't be for a gov. job, by the way... Thanks!

    • ANSWER:
      ALL hair drug test companies in the United States are only certified to 90 days. It would NOT matter if this was for a government agency or not. ALL probation departments, schools, and employers will use only certified drug test companies.

      Human head hair grows at a rate of a half inch per month; plus or minus a few tenths of an inch. ALL certified drug test companies will only test the most recent 1.5 inches of head hair; thus giving them the 90 day window of detection.

      However, since some individuals hair grows slower than the average, it is wise to give yourself another month to make sure you are out of detection zone. Also one needs to calculate the date they last ingested illegal substances and add another 10 days on to the count. Therefore, to be really safe one should give themselves four and a half months with NO illegal drug usage in order to be confident of a PASS. And if you really, really need peace of mind; give yourself five to six months.

      The above applies only if human head hair is used for the sample. If subject s head hair is less than 1.5 inches, the drug test company is then able to use body hair if the customer, e.g., probation department, employer, school, etc., authorizes it. (This is why you should NEVER listen to anyone who advises you to shave your head before a hair drug test.)

      Most human body hair grows at slower varying rates and therefore has the potential to sometimes pick up drug usage to approximately a year or so back. If you have no head hair or body hair to give them because you shaved it all, then it is up to the customer as to what they want to do. In most cases they will classify that as a FAIL unless you have good reason why you have no hair.

      There is NO need to wear your hair short for fear of these hair drug tests. They will ONLY test the most recent one and a half inches of head hair. Although the misconception of people assuming the lab will test the entire length of hair is understandable; this is NOT how a hair drug test works. Not only would that policy be unfair to women and others who wear their hair long; it is NOT permitted due to the certification.

      The reason why hair drug test companies are ONLY certified 90 days out is due entirely to the FACT that hair drug test research has proven they get unreliable results much beyond 90 days. This does not mean however that if they take body hair they will not be able to possibly get a positive result beyond 90 days. This is why you must avoid giving them body hair if at all possible. Some lab techs will try and claim head hair isn t quite an inch and a half long and therefore want to take some body hair for the sample. If your head hair is over an inch and a half long; do NOT give them the opportunity.

      Ignore ALL posters who claim: hair drug tests detect back several years; they do NOT. Although it may be true that in theory it is possible to detect drug use years out, theories and conjecture do NOT apply to hair drug test companies. But this is an understandable misconception.

      If however you get any poster who claims: hair drug tests pick up any drug you ever did; or hair drug test companies pluck the hair from follicle or bulb or any other idiotic claimed procedure that spews from their writing, and they go on to claim, therefore it wouldn t matter how short your hair, it will pick up drug use years out: JUST LAUGH AT THEM!! It is scary that these types of morons who lack common sense walk amongst us; and some even drive!!

      http://marijuanahairtest.com/

  2. QUESTION:
    With General Motors Hair Folical test, how far back can they detect drugs in your hair?
    I have been clean of all drugs untill about 3 months ago. I had took a couple of hits of some pot at a concert like a bonehead. Since then i have been back to staying clean? i guess my question is how far back do they test for drugs in your hair and would a couple of hits even be enough to show up. (I understand with a hair folical test they can test back to 7 years but not all employers test back that far and through what I could find out is that there is a cutoff as far as how much they test for. example: testing for the amount of a joint or more.) Thank you in advance for your responses

    • ANSWER:
      Hair drug tests do NOT go back 7 years.

      I'll just cut and paste an answer I gave to someone else
      XXXXXXXXX
      OK; let me make this as plain as possible so perhaps others who read this will stop this ridiculous myth that one MUST shave their head to pass the hair drug test.

      You DO NOT need to shave your head!!!!!

      It's as if these people believe there's some magical process that occurs with a razor that doesn't occur with scissors.

      I would bet money the reason so many kids have their heads shaved now has to do with their fear of this myth. LOL

      Human head hair grows at precisely a half inch per month; plus or minus a few tenths of an inch.

      Certified hair drug test companies will take 30 to 120 hairs from your head. However, NO MATTER how long your head hair is, at lab they will cut the hair one and a half inches from the base and throw the rest out. They test the one and a half inches from base, giving most a 3 month detection window. The small few whose hair grows really, really slowly may have up to a 4 month detection time. Also it takes 3 to 10 days for the drug metabolites to break through surface of scalp. So at extreme most, you are looking at four and a half months for head hair. If you haven't done the drugs they are testing for in that time, you WILL pass.

      drug metabolites DO NOT swim back down hair shaft to spawn new drug metabolites! They don't say, "Oh no!! Timmy's about to get his hair cut, we got to rush back down and hide in hair bulb to be safe from the scissors!! And if oh my God, Timmy tells barber to use electric razor we won't make it back in time and we will all be doomed!!"

      Hypothetically; they can detect drug metabolites in hair for up to a few years; BUT, and that's a big but, that's assuming you haven't cut your hair IN YEARS. Seriously people, how many persons have you known that hasn't had a hair cut in years?? Secondly, hair continually falls out and is replaced even without a hair cut. Ever notice the amount of hair you accumulate on hair brush? Odds of having hair that has been around more than 2 years is almost zero. And this is the biggest but of all; they only test and inch and a half from the base anyway so you can wear your hair as long as you like.

      Disclaimer: The above only applies to certified drug test companies (which ALL probation and employers use).
      However to get around certification some drug companies allow parent to send in 2 separate samples. So if hair is say 3 inches long, they certify 90 days back but are technically checking up to 6 months back because hair was cut in half and sent as two separate tests. (read site provided below for further). But even then your parents are often times wasting their money. Metabolites DO break down over time and hair falls out and is replaced over time so you are still more likely to pass than fail if its been more than 4 months since last drug usage.

      Body hair on the other hand grows at a slower rate so drug metabolites can (BUT NOT OFTEN DO), get picked up for up to a year out. So it's best to give them head hair. Your hair on head should be kept at 1.5 inches or LONGER, so they don't take body hair.

      If they take less than 1.5 inches of head hair detection time is reduced: example half inch is 2 to 6 weeks back.

      Unfortunately I think this myth that hair drug tests detect drug use years and decades back is from false advertising. Both drug test companies and detox companies tend to mislead by implying hypothetical standards to get you to buy what they are selling. So many sites imply possible detection a couple years out but read carefully: they are using hypotheticals.

      Oh, and drug metabolites are NOT bacteria or parasites!! They don't spawn offspring. They get trapped in hair bulb at time you do drug. Calculate last drug usage date and use ruler. Use scissors to cut that piece of hair off if you want to be really safe. They can't detect drug metabolites if there's none in sample!!

      Please end the cycle of ignorance by reading at least some of the drug test websites that I have provided below:

      http://www.craigmedical.com/Hair_Drug-Test_FAQ.htm

      http://www.sacsconsulting.com/qa.htm

      http://www.passahairdrugtest.com/hair_drug_testing_faq.php

  3. QUESTION:
    How would I pass these drug tests?
    I have to take a drug test.
    Sometime next week or soon.
    Ast time I smoked was last Friday, about a week ago.
    How would I pass a pee test??
    How would I pass a hair drug test??

    • ANSWER:
      Poster Kyle is wrong: hair drug tests do NOT pick up everything you did; they only certify 90 days out because they are too inconsistent with results beyond 90 days, not because employers only care about past 90 days.

      You may pop positive for marijuana on hair test depending on how much you did but hair tests are not good at picking up low dose or infrequent use, so you have a chance at passing. Below is a paste I wrote to another question about how hair test works:
      Xxxxxx
      OK; let me make this as plain as possible so perhaps others who read this will stop this ridiculous myth that one MUST shave their head to pass the hair drug test.

      You DO NOT need to shave your head!!!!!

      It's as if these people believe there's some magical process that occurs with a razor that doesn't occur with scissors.

      I would bet money the reason so many kids have their heads shaved now has to do with their fear of this myth. LOL

      Human head hair grows at precisely a half inch per month; plus or minus a few tenths of an inch.

      Certified hair drug test companies will take 30 to 120 hairs from your head. However, NO MATTER how long your head hair is, at lab they will cut the hair one and a half inches from the base and throw the rest out. They test the one and a half inches from base, giving most a 3 month detection window. The small few whose hair grows really, really slowly may have up to a 4 month detection time. Also it takes 3 to 10 days for the drug metabolites to break through surface of scalp. So at extreme most, you are looking at four and a half months for head hair. If you haven't done the drugs they are testing for in that time, you WILL pass.

      drug metabolites DO NOT swim back down hair shaft to spawn new drug metabolites! They don't say, "Oh no!! Timmy's about to get his hair cut, we got to rush back down and hide in hair bulb to be safe from the scissors!! And if oh my God, Timmy tells barber to use electric razor we won't make it back in time and we will all be doomed!!"

      Hypothetically; they can detect drug metabolites in hair for up to a few years; BUT, and that's a big but, that's assuming you haven't cut your hair IN YEARS. Seriously people, how many persons have you known that hasn't had a hair cut in years?? Secondly, hair continually falls out and is replaced even without a hair cut. Ever notice the amount of hair you accumulate on hair brush? Odds of having hair that has been around more than 2 years is almost zero. And this is the biggest but of all; they only test and inch and a half from the base anyway so you can wear your hair as long as you like.

      Disclaimer: The above only applies to certified drug test companies (which ALL probation and employers use).
      However to get around certification some drug companies allow parent to send in 2 separate samples. So if hair is say 3 inches long, they certify 90 days back but are technically checking up to 6 months back because hair was cut in half and sent as two separate tests. (read site provided below for further). But even then your parents are often times wasting their money. Metabolites DO break down over time and hair falls out and is replaced over time so you are still more likely to pass than fail if its been more than 4 months since last drug usage.

      Body hair on the other hand grows at a slower rate so drug metabolites can (BUT NOT OFTEN DO), get picked up for up to a year out. So it's best to give them head hair. Your hair on head should be kept at 1.5 inches or LONGER, so they don't take body hair.

      If they take less than 1.5 inches of head hair detection time is reduced: example half inch is 2 to 6 weeks back.

      Unfortunately I think this myth that hair drug tests detect drug use years and decades back is from false advertising. Both drug test companies and detox companies tend to mislead by implying hypothetical standards to get you to buy what they are selling. So many sites imply possible detection a couple years out but read carefully: they are using hypotheticals.

      Oh, and drug metabolites are NOT bacteria or parasites!! They don't spawn offspring. They get trapped in hair bulb at time you do drug. Calculate last drug usage date and use ruler. Use scissors to cut that piece of hair off if you want to be really safe. They can't detect drug metabolites if there's none in sample!!

      Please end the cycle of ignorance by reading at least some of the drug test websites that I have provided below:

      http://www.craigmedical.com/Hair_Drug-Test_FAQ.htm

      http://www.sacsconsulting.com/qa.htm

      http://www.passahairdrugtest.com/hair_drug_testing_faq.php

  4. QUESTION:
    How long does THC stay in your hair?
    I was a daily user of marijuana up until about 6 months ago, and then I quit cold turkey and havent touched it since. I recently had an interview.....and they say they want to do a hair drug test. Will I be okay?
    I've shaved my head at least 10 times since then, it's about an inch long right now.

    • ANSWER:
      All hair drug test companies in the United States who are certified are required to follow exact procedures and not deviate from that protocol in the slightest. All probation departments, employers, and schools use certified drug test companies.

      As per certification: drug test companies will only test the most recent 1 inches of head hair; therefore, it does NOT matter if you wear your hair long, they are only testing the most recent 1 inches. Human head hair grows at a predictable rate of inch per month; plus or minus a few tenths of an inch. This gives them a 3 month detection window. If the subject does not have at least 1 inches of head hair, they are allowed to take body hair. Most body hair grows at a slower rate and therefore could (but not often) increase the detection window to about one year.

      Shaving your head hair or having less than 1.5 inches allows them to take body hair and this increases the risk of longer detection times. If you like wearing your hair long you can because it will NOT interfere with test.

      If you want to be EXTRA safe don t do any drugs that the lab is testing for within 6 months of the time you are taking the test. The reason is: 1) For any drug you do, it takes 3 to 10 days for the drug and it s metabolites that are trapped in the hair bulb to grow beyond the scalp.(You can do ALL the drugs you want 3 to 10 days before the hair drug test and the results will be negative for those drugs. But be aware some employers are getting wise to this fact and will pay additional to have a urine drug test done along with the hair drug test; you will PASS on the hair drug test but FAIL on the urine drug test.) 2) You have no idea with certainty how fast or slow your hair grows so you CANNOT assume your head hair is growing at exactly a half inch per month. If it is growing at a slower rate than the average you will have a longer detection window. 3) If you are a heavy, heavy, daily weed smoker it would be wise to give yourself an extra 30 days to drop those THC levels below the 50 ng/ml cut off level that the hair drug test is certified to test for. THC and THC COOH is stored in fat cells and does get released in small quantities into blood stream for extended periods of time but not enough will get trapped in sufficient quantity in the hair bulb to fail a hair drug test beyond a few days past the time you smoked. And this is why you can fail a blood test for THC and its metabolites months out but pass a hair drug test because trace amounts do NOT matter; THC and its metabolites need to be above 50ng/ml to fail a hair drug test. But if you smoke weed heavily give yourself extra time. Six months is good enough to pass if head hair is used and this includes a buffer zone in case your hair grows slower than you assumed.

      ( I am not critical of the ones who heard a false rumor about the hair drug test and simply repeat what they heard about it or think they know about it; they are just trying to be helpful; wrong but helpful nonetheless.) This is just for the arrogant dumbasses who act superior to the poster and call them losers or dumbasses for not knowing how the hair drug test works but yet spew BS about the hair drug test by writing things like: hair drug tests detect every drug you ever did; or they pluck one hair or test the hair bulb; or hair drug tests detect drug usage years back!! Are you really that stupid? Yes in theory drugs can be detected in hair for as long as the length of hair; and yes hair drug tests can detect substances in mummies thousands of years back, but you forget a couple important facts: The mummy is DEAD!! Do you really know of any live person who doesn t cut their hair on a regular basis? And even if they hadn t cut their hair in 7 years; hair does fall out and is replaced with new hair over time!! It should be painfully obvious that hair drug test companies can NOT detect drugs or metabolites in the hair being tested if there are no drugs or its metabolites in the hair. Living people do metabolize drugs and metabolites at consistent, predictable rates; drug metabolites are not bacteria, they do NOT spawn new drugs or metabolites for years to come. So yes in THEORY if the drug test company has hair that has been around several years they can sometimes detect drugs from that sample if you did drugs when that hair was forming; but in reality certified drug test companies will only test the most recent 1.5 inches of hair. If you don t believe me; Look it up.

  5. QUESTION:
    Requirment for passing Hair Drug Test?
    I know that hair drug test go back 7 years. The question is: If the drug test shows up positive, let's say, 5 years ago. Would that be considered failing?

    • ANSWER:
      Wow; I don't know who told you 7 years but they're full of crap. (Now theoretically it's possible if you haven't cut your hair in 7 years; but even if you haven't the drug test lab under NIDA standards will only test 1.5 inches of your head hair from the base, giving you a 3 to 4 month detection window. Unless they are forced to take body hair; which then can detect up to a year.) Below is a paste of an answer to someone else.
      XXXXXXXXXXXX

      Hair drug test answers are the most entertaining for me because so many provide such wildly inaccurate information.

      First: Hair follicle tests cannot pick up drug useage 3 to 10 days prior to the test. This is due to the hair not growing through the scalp in time to be taken for the sample.

      Head hair grows a half inch per month plus or minus a few tenths of an inch. If your hair grows really fast it may only take 3 days to go from the bulb, where metabolites are collecting, to then grow past the scalp, whereby it can be taken to be used in the sample; if your hair grows really slow, that process could take 10 days.

      Second: The sample that is collected contains between 30 to 70 strands of hair. No matter how long your hair is, the an hour employee who cuts your hair puts all of it in a sealed bag. At the lab, the .50 an hour tech measures and cuts hair to one and a half inches from base and throws the rest out. The one and a half inches is tested; with a possible detection time of 3 to 4 months, depending on how slow your hair grows.

      Third: In order to fail, they must get concentrations above the cut off level; so even if they detect trace amounts you will still PASS if the amount of concentration level is lower than the cut off.

      Four: Extremely small amounts of metabolites get trapped in the hair bulb as the hair cells are forming. And they do not get trapped evenly; at random, some hairs get more, some get less, and some get none at all trapped in the hair strand.

      Statistically when they get 30 to 70 hair strands the lab's odds are greater to get a hit than if they only had one strand to test. And the lab is at the nanogram level so they don't need much. But depending on which drug they are testing for, the amount has to exceed that level or you pass.

      Hair drug tests are not good at picking up low dose or infrequent use; and drug test companies often times hate to admit that, but other hair drug test companies freely do admit that it is one of their weaknesses (and it's about their only weakness).

      I am not advocating that this means you are guaranteed to pass if you only popped one to three pills or smoked weed one to three times during detection period; but you are more likely to pass than fail. Once you go beyond 2 or 3 times during detection period; you will almost always fail. The odds of a fail continue to increase the more you did drugs in detection zone. (With marijuana its harder to calculate because much depends on quality and how much you inhaled.)

      The smartest call you can make is not to do any drugs in detection zone prior to an upcoming hair test; but if it's too late then you might still be safe if you kept your drug usage during detection period to a minimum.

      Too many false answers claiming guaranteed to fail or hair tests goes back 20 years, or they can pick up what you had for breakfast 40 years ago. Or the one I love the most is; it doesn't matter how short short your hair is because they still detect back 3 years. I guess these people think, your old hair tells the newly born hair what drugs you did years ago and just passes the information along from generation to generation of hair.

      The test cannot detect metabolites if there aren't any in sample. If your head hair sample is a half inch long, your detection time is 2 to 6 weeks.

      If your head hair is less than an inch and a half long, they are often authorized to take body hair. Body hair grows at slower rate and could, but not often, but could detect drug use up to a year back. It is not to your advantage to give them body hair, so don't shave your head just before the test. You are risking potentially longer detection times and more unpredictable results.

      Below are three sites that explain this hair test in more detail. Keep in mind that all 3 are trying to sell you their products so they slant their information a bit.

      http://marijuanahairtest.com/

      http://www.ipassedmydrugtest.com/hair_drug_test_FAQ.asp

      http://www.passahairdrugtest.com/hair_drug_testing_faq.php

  6. QUESTION:
    Information on hair drug testing?
    I am drug testing my son for the use of marijuana in a hair follicle test. what are some of the ways he would try to "evade" procedure? is there any way he can possibly change the chemistry on the head besides shaving it..? he has probably used marijuana 1-3 months ago and has recent haircuts, as short as 4 cm. will there still be residue? and he's an athlete, he sweats occasionally on a weekly basis. i'm not doing this to get him in trouble. i just would want him to be able to get a job and to be successful in the future. we already have spoken about it and i just want to make sure hes eligible and keeping his life straight. Please be respectful.

    • ANSWER:
      When smoked, marijuana enters the bloodstream and as the blood nourishes the hair, the drug gets into the hair follicles too. As the hair grows, the hair follicles contain traces of THC that can confirm the intake of marijuana. THC can show up in hair about a week after consumption (it takes the hair bearing traces of THC that long to emerge from the scalp).

      While hair drug testing provides a good opportunity to confirm whether someone has been on marijuana, and has the largest detection window, the issue is that this drug is not one of the easiest drugs to hair test. THC, when it s in your body, does not always bind successfully to the hair follicle. Therefore, it is possible that a semi-frequent user may get a negative reading on a hair follicle drug test while someone who had it just once a couple of weeks back may get a positive result. It is a bit of a toss up. The hair follicle drug test is therefore not considered to be as reliable for marijuana as it is for other drugs like cocaine (and for drugs like cocaine, and all other drugs tested for in a standard consumer hair drug test, hair follicle drug testing is actually found to be better at catching drug use than urine tests).

  7. QUESTION:
    Hair drug test detection periods?
    I am 15 5' 7'' and 147 pounds. I got caught by my parents with weed two thursdays ago and have been sober since. At that point I was smoking 1-2 times a day for several weeks. My father said he would test me but has not mentioned it since and i dont know when or if he will actually do it but i have quite a specific question. I am aware that follicle drug tests have a 90 day window of detection. It has been 9 days since I have gotten caught if I smoked again would that add another 90 days to the detection period if he decided to test me randomly a while from now? Help appreciated!
    But the point I am trying to find out is, if he tests me within the next 90 days i can say well yeah of course i failed it has a 90 detection period but if he tests me in 120 days and i show up positive i cant say that, so each time you smoke will it add another 90 days or does it just stay within the 90 period that is already there.
    I have spoken and done research to many testing labs and they all say it is 90 days. IF you are right and it is a 6 month period that would help me out even more because i can say yes it goes back 6 months what did you expect. but still my question has yet to be answered

    • ANSWER:
      First, hair drug tests are REALLY expensive. They don't do that for jobs and stuff like that because it is so expensive. If your parents are really rich, they may get a hair test, but I would doubt it. If he's really going to test you, he would probably do a urine or blood test. So you'd want to be clean for at least a month for that.

      Yes, weed stays in your system for about three months. It is based on the last time you smoked weed. So if you smoke weed today, it will show up on a hair test 3 months from now. It is basically 90 days since the last time you smoked weed.

  8. QUESTION:
    will i pass a hair drug test?
    Hi I stopped smoking weed around sep 2011, I'm 6'5 about 200 lbs . I work out daily and I have a fast metabolism. I'm getting tested on the 10th , Think I would be able to pass and have you ever heard of ultra clean before ?

    • ANSWER:
      OK; let me make this as plain as possible so perhaps others who read this will stop this ridiculous myth that one MUST shave their head to pass the hair drug test.

      You DO NOT need to shave your head!!!!!

      It's as if these people believe there's some magical process that occurs with a razor that doesn't occur with scissors.

      I would bet money the reason so many kids have their heads shaved now has to do with their fear of this myth. LOL

      Human head hair grows at precisely a half inch per month; plus or minus a few tenths of an inch.

      Certified hair drug test companies will take 30 to 120 hairs from your head. However, NO MATTER how long your head hair is, at lab they will cut the hair one and a half inches from the base and throw the rest out. They test the one and a half inches from base, giving most a 3 month detection window. The small few whose hair grows really, really slowly may have up to a 4 month detection time. Also it takes 3 to 10 days for the drug metabolites to break through surface of scalp. So at extreme most, you are looking at four and a half months for head hair. If you haven't done the drugs they are testing for in that time, you WILL pass.

      drug metabolites DO NOT swim back down hair shaft to spawn new drug metabolites! They don't say, "Oh no!! Timmy's about to get his hair cut, we got to rush back down and hide in hair bulb to be safe from the scissors!! And if oh my God, Timmy tells barber to use electric razor we won't make it back in time and we will all be doomed!!"

      Hypothetically; they can detect drug metabolites in hair for up to a few years; BUT, and that's a big but, that's assuming you haven't cut your hair IN YEARS. Seriously people, how many persons have you known that hasn't had a hair cut in years?? Secondly, hair continually falls out and is replaced even without a hair cut. Ever notice the amount of hair you accumulate on hair brush? Odds of having hair that has been around more than 2 years is almost zero. And this is the biggest but of all; they only test and inch and a half from the base anyway so you can wear your hair as long as you like.

      Disclaimer: The above only applies to certified drug test companies (which ALL probation and employers use).
      However to get around certification some drug companies allow parent to send in 2 separate samples. So if hair is say 3 inches long, they certify 90 days back but are technically checking up to 6 months back because hair was cut in half and sent as two separate tests. (read site provided below for further). But even then your parents are often times wasting their money. Metabolites DO break down over time and hair falls out and is replaced over time so you are still more likely to pass than fail if its been more than 4 months since last drug usage.

      Body hair on the other hand grows at a slower rate so drug metabolites can (BUT NOT OFTEN DO), get picked up for up to a year out. So it's best to give them head hair. Your hair on head should be kept at 1.5 inches or LONGER, so they don't take body hair.

      If they take less than 1.5 inches of head hair detection time is reduced: example half inch is 2 to 6 weeks back.

      Unfortunately I think this myth that hair drug tests detect drug use years and decades back is from false advertising. Both drug test companies and detox companies tend to mislead by implying hypothetical standards to get you to buy what they are selling. So many sites imply possible detection a couple years out but read carefully: they are using hypotheticals.

      Oh, and drug metabolites are NOT bacteria or parasites!! They don't spawn offspring. They get trapped in hair bulb at time you do drug. Calculate last drug usage date and use ruler. Use scissors to cut that piece of hair off if you want to be really safe. They can't detect drug metabolites if there's none in sample!!

      Please end the cycle of ignorance by reading at least some of the drug test websites that I have provided below:

      http://www.craigmedical.com/Hair_Drug-Test_FAQ.htm

      http://www.sacsconsulting.com/qa.htm

      http://www.passahairdrugtest.com/hair_drug_testing_faq.php

  9. QUESTION:
    How is a drug test on hair performed? What are the methods used?
    Is there a specific type of machinery involved, what is the process for which it is analyzed, etc. Basic facts on how conclusions are made. For a school project.

    • ANSWER:
      Hair testing: Hair analysis:

      Hair analysis to detect drugs of abuse have been used by UK and Canadian courts,
      and hair testing for alcohol markers is now recognised in both the UK and US judicial
      systems. There are guidelines for hair testing that have been published by the Society
      of Hair Testing that specify the markers to be tested for and the cut off concentrations
      that need to be tested. There are only a few UKAS ISO17025 accredited laboratories
      in the UK including Tricho Tech based in Cardiff and Alpha Biolaboratories based in
      Warrington, UK. Drugs of abuse that can be detected include Cannabis, Cocaine,
      Amphetamines and drugs new to the UK such as Mephedrone.
      The hair follicle test is growing in popularity because it is less invasive than a urine
      screen, it is harder to falsify or tamper with the specimen, and the detection window
      is extended to roughly three months. Hair for testing can be collected from anywhere
      on the body, so the test can be utilized even when someone is bald or shaves their
      head. Because body hair grows at a different rate than head hair, some people who
      have made the correlation that drug use can be detected in body hair for up to 12
      months.

      Which Drugs Can Be Tested:
      Cocaine, marijuana, opiates, methamphetamine and phencyclidine, or PCP, can
      be detected through a hair drug test. Nicotine, methadone, simple benzodiazepines,
      some antidepressants and mescaline have been detected in hair, too, but these
      tests are still in the process of research and development. To rule out the possibility
      of external contamination, such as by marijuana smoke, testing labs look for both
      drug and its metabolites, or by-products, produced by the body.
      According to Omega Laboratories, a standard hair test requires 60 or more milligrams
      of hair, cut as close to the scalp as possible, or approximately 90 to 120 strands,
      depending on the hair thickness. Each half-inch of head hair provides a 30-day history
      of drug use. The standard is to test 1.5 inches of hair, or a period of approximately
      90 days. If there is not enough head hair, body hair can also be used, but due to the
      slower growth, the time-frame represented is approximately one year.

      Laboratory Analysis:
      After consuming drugs, the body processes them into drug metabolites, which
      the bloodstream carries to the hair. They enter the hair follicle and move into the
      hair strand where they remain embedded inside the hair shaft. Specialized
      laboratories extract the drug metabolites from the hair sample and purify and
      concentrate them. They test them by various chromatography methods -- laboratory
      techniques that separate and analyze specific components in a mixture, and also
      by antibodies that can recognize specific drug molecules.

      Confirmation:
      Antibodies that test for the drugs can sometimes mistake prescription medications
      for drugs, and thus cause a false positive screening result. To eliminate that
      possibility, laboratories have to confirm all positive results for methamphetamine,
      opiates, PCP, cocaine and marijuana. The method used is gas chromatography-mass spectrometry, or GC-MS, which combines two standard chemical techniques to
      identify different substances within a test sample.

      Advantages and Disadvantages:
      When compared to the standard urine testing, hair drug tests can detect a
      longer period of drug use. Many drugs, with the exception of marijuana, are
      rapidly excreted from the body, making them undetectable in urine if the test
      is done more than two to three days after use. Since the drug metabolites
      reside inside the hair shaft, bleaches, shampoos and other chemicals cannot
      alter the sample. Additional advantages include non-invasive collection procedures
      and easy sample storage. The limitations of hair drug testing are hair length, high
      cost and the inability to detect very recent drug use.

  10. QUESTION:
    are hair drug tests expensive?
    My school said their goal for this year is to test every single student I don't do it but I wonder if thats possible? Also how does it work?

    thankss

    • ANSWER:
      I am a former Medical Marijuana patient. Yes, hair tests are quite expensive. While they don't disclose every drug that good blood panel test will show, they can detect former use of some drugs, such as marijuana use (possible use as long as a year ago, although they have a legal window of 90 days). They can not be cheated, and the don't have to stick a needle in anyone. Some drugs do not show on anything, such as 'sh rooms, and some of the drugs show only on 24 hour windows, (depending on the test and the drug). Drugs migrate in to the the living root of the hair. Shampoo does not clean it (shampoo will clean surface smoke. If you don't use marijuana and are in the the smoke of someone who does, shampoo your hair). They yank about 12 - 20 hairs from your scalp (includes the roots). A highly paid tech samples about 6 of your hairs / student. The only way to beat it is shave your head. They don't don't have to guess why. They (may) court order a sensitive blood test. Google hair test false faIse positives. I suggest that you make sure to inform them about drugs that you legally take. You may need an MD note for some. Also, OTC drugs which the test can disclose and which may be also legal in OTC may pose a problem. I don't know if pseudo ephedrine can show up on a hair test, but if it were so, it may pop positive as a problem for you as abusing it and related drugs. (Hair tests can not test for everything). I know that the federal government field tests see chocolate as THC. One man, who made candy for a living, was arrested for possessing 50 or so pounds of bulk chocolate. It tested positive for THC. He was arrested for possession of hash with intent to distribute. They tore apart his home and business (including the walls), his car, his records, took his computer, his cell phone, froze his bank accounts, and took his 6 mos kid. He was awaiting a possible life sentence. After proving that it was chocolate, he had no place to live, no business. They still have his kid because he has no visible means of support, and is in trouble with the IRS for failure to pay income tax. The government is not responsible for paying you for evidence, and the police can not be sued for collecting it. Oh well. Some Rx drugs cause false positives, so let them know all of your Rx drugs.

      Some people are so stupid that if they spit it goes backwards in goes in to their face (they are
      "Spit backwards stupid"). I used to live in IA. During WWII the federal government required that all farmers grow 10 percent of their land as hemp (not marijuana, hemp contains no THC). They made hemp rope (used by the navy).
      WWII is long since over, but the seeds from that hemp blew in the wind, and hemp grows all over IA. Millions of feral hemp plants line the highways. It grows in parks and in ditches, by schools, next to the basketball fields. It is truly a weed. My dogs peed on it, it lines the public paths. No one who lives there touches it. It looks exactly like marijuana. Sometimes a spit backwards stranger would wonder in, and thinking that had found someones stash collected hundreds of pounds of it, rented a truck and had planned to get rich. They would smoke some. If they did get high it was from dog pee and insecticide. They would get arrested. Hemp possession is illegal, and is punished as marijuana. A life sentence. As I had said, some people are spit backwards stupid.

      I was never tested because I never hid my use. I also support the police because they keep the crack heads and meth users away from little kids.

      I answer a lot of questions on marijuana. One poster had boasted that he was going to pass the urine test by putting someone else's pee in a condom. Condoms only leak urine - with or without an erection.

  11. QUESTION:
    Hair drug test question HELP!?
    So my friend did weed last month and she is going to get hair tested but sje said "it was my first time smoking in a year and i didnt even get high" do you think it will show up? And if so how long will it take to get out of her hair?

    • ANSWER:
      She will likely disclose for THC. It can take a year for a hair test to clear. Hair tests are not often
      used in a court of law, because they are too easily dismissed by an attorney. Their window is limited to 90 days. Hair tests must be interpreted by a technician, making it easy for an attorney to challenge.
      They are very useful for a general screen of drug use. If this is for employment, they don't have
      to argue in court, because you are not going to go to prison.

  12. QUESTION:
    Hair drug test???????????
    I don't use drugs on any kind any more and am much better off for it. My question is a rather tricky one and can't seem to find any information on it anywhere. I last smoked pot over 90 days ago and have read most hair test give a 90 day window. Does this mean I am in the clear now. I can't figure it out if it's 90 days from the last use hair starts to grow clean or from the last use it starts to grow clean. In otherwords the test needs approximately 1.5 inches of hair. That is how long my hair is and that is how long your hair grows in 90 days. Follow me. Help........

    • ANSWER:
      Most places don't use hair strand tests because it is too costly. If you have to make sure your hair is clean and pristine, the only way you will be able to tell for certain is if you actually take the test. You can probably buy one over the internet, but it isn't that cheap.

  13. QUESTION:
    What are the pros and cons of hair test?

    • ANSWER:
      Pros: Hair Drug Testing kits have a very long drug detection window. For most drugs it can detect drug use about 90 days or more. This testing method is very donor friendly. Adulteration is a lot more difficult in hair drug testing than any other test method. The hair test is very dependable and accurate.
      Cons: The main disadvantage of hair drug testing is the fact that you need a lab to run the test and generate the results. Because of this extra step it might take a few additional days to get results. Another disadvantage of the hair drug test is the fact that it might not detect very recent drug use. Hair drug test kits are usually the most expensive drug test kits due to the need for lab testing. If hair follicle test suits your requirement and want to know more information about it, check it out below

  14. QUESTION:
    hair folical tests?
    how accurate are they? what do they show? can they tell what you did and when you did it or just what was in your system?

    • ANSWER:
      They are very accurate. A hair sample drug testing can detect drug use for up to 90 days after use. The detection window is much larger in hair drug testing (compare it to few days for urine and saliva based drug testing) because trace amounts of drug chemicals become trapped inside each hair. A simple lab test can detect these trace chemicals making for either a positive or negative test result. Once the results are recorded, you are sent notification of the results. Some companies even provide a phone service where you call in, enter an account number and retrieve the results in that way.

      Hair sample drug testing can detect all of the major types of drugs, including marijuana, opiates, methamphetamines, PCP, ecstasy, and cocaine. Hair follicle drug testing can detect the trace amounts of illicit substances trapped in the cortex of the hair for up to 90 days after use.

      Employee drug testing programs often incorporate hair follicle drug testing into their plans because of the sheer accuracy of these tests. Even though hair testing is more expensive that a urine drug test kit, for example, they can provide a level of accuracy that is nearly ten times that of other testing methods. Likewise, hair follicle drug testing does not involve the embarrassing collection of samples like that of urine or saliva drug tests. In most cases, a few strands of hair is all that is needed to obtain accurate results.

  15. QUESTION:
    NYPD drug hair testing?
    How long after the written NYPD exam is the drug screening?
    Ive read that since 2005 it has been a hair sample, is this true?
    Finally, is there a polygraph that one would have to pass?

    • ANSWER:
      The NYPD does use hair testing for its drug screening. It's a highly accurate test that goes back approximately 3 months for the average person, although it could be smaller or larger window of time depending on your body chemistry and the location from which the hair sample is taking.

      The NYPD typically does this test as one of the final steps before your hire, probably because it is not an inexpensive procedure. For most people this takes place after the written exam, the physical test, the psychological examinations, and the initial medical screening.

      Doing drugs does not make you a bad person. If you want to be a cop, though, those days should be well behind you. You likely have at least 6 months between the written exam and the drug test, but if you are concerned about timing your drug test with the end of your drug use you are probably not cut out for this job. You will be randomly drug tested throughout your 22+ year career, and any positive results will lead to immediate termination.

      Finally, the NYPD does not conduct polygraph testing for its new hires, although other departments in the area do. If you plan to apply to another area department at some point, keep in mind that they will likely have a copy of your NYPD background investigation in hand when you do your polygraph. Don't plan on changing your story, because you will almost certainly get caught...

  16. QUESTION:
    How far back does a hair drug test go?
    My friend needs to know if he should even apply to a job that requires a hair drug test. So how long back do they take? Websites explaining are very welcome.

    • ANSWER:
      copied from http://en.wikipedia.org/wiki/Drug_test#Hair_drug_testing

      [edit] Hair drug testing
      Hair testing is quite accurate and can go back normally 3 months (6 months or longer possible with specialty tests), showing any drugs of abuse used in the detection window. As hair grows out, any drugs used are encased in the hair shaft, so the longer the hair, the longer back in the individual's drug history the lab can detect. Accredited hair drug testing labs, however, only use hair within about 2.5 4 cm of the scalp, and discard the rest. With head hair each 0.5 inch (0.8 cm) corresponds to about 30 days. This limits the detection history to about 90 days, depending upon the rate of growth of the individual's hair. Some people attempt to circumvent this through shaving their heads. In the absence of the required amount of hair on the scalp, body hair can be used as an acceptable substitute. It is also possible to use body hair to do hair drug testing, but since body hair grows slower, the head hair window of detection measures will not apply to body hair.

      Additionally, for pre-employment hair testing, the inability to obtain a sample may be grounds for not hiring the individual. Hair Testing labs are regulated by CLIA or SAMSHA (not FDA).

      Good luck.

  17. QUESTION:
    I'm being ordered to take a hair follicle drug test. I'm just wondering if I will pass?
    I haven't smoked in a little over 90 days and when I did it was just one bowl. I've been reading online for a few days now and can't seem to find a good answer. Everyone says something different. I have long hair too and I'm curious about when they test, how far back are they going? It doesn't seem fair for them to bring up something I did a year ago. Do those kinds of tests only go back 90 days?

    • ANSWER:
      All hair drug test companies in the United States who are certified are required to follow exact procedures and not deviate from that protocol in the slightest. All probation departments, employers, and schools use certified drug test companies.

      As per certification: drug test companies will only test the most recent 1 inches of head hair; therefore, it does NOT matter if you wear your hair long, they are only testing the most recent 1 inches. Human head hair grows at a predictable rate of inch per month; plus or minus a few tenths of an inch. This gives them a 3 month detection window. If the subject does not have at least 1 inches of head hair, they are allowed to take body hair. Most body hair grows at a slower rate and therefore could (but not often) increase the detection window to about one year.

      Shaving your head hair or having less than 1.5 inches allows them to take body hair and this increases the risk of longer detection times. If you like wearing your hair long you can because it will NOT interfere with test.

      If you want to be EXTRA safe don t do any drugs that the lab is testing for within 6 months of the time you are taking the test. The reason is: 1) For any drug you do, it takes 3 to 10 days for the drug and it s metabolites that are trapped in the hair bulb to grow beyond the scalp.(You can do ALL the drugs you want 3 to 10 days before the hair drug test and the results will be negative for those drugs. But be aware some employers are getting wise to this fact and will pay additional to have a urine drug test done along with the hair drug test; you will PASS on the hair drug test but FAIL on the urine drug test.) 2) You have no idea with certainty how fast or slow your hair grows so you CANNOT assume your head hair is growing at exactly a half inch per month. If it is growing at a slower rate than the average you will have a longer detection window. 3) If you are a heavy, heavy, daily weed smoker it would be wise to give yourself an extra 30 days to drop those THC levels below the 50 ng/ml cut off level that the hair drug test is certified to test for. THC and THC COOH is stored in fat cells and does get released in small quantities into blood stream for extended periods of time but not enough will get trapped in sufficient quantity in the hair bulb to fail a hair drug test beyond a few days past the time you smoked. And this is why you can fail a blood test for THC and its metabolites months out but pass a hair drug test because trace amounts do NOT matter; THC and its metabolites need to be above 50ng/ml to fail a hair drug test. But if you smoke weed heavily give yourself extra time. Six months is good enough to pass if head hair is used and this includes a buffer zone in case your hair grows slower than you assumed.

      (I am not critical of the ones who heard a false rumor about the hair drug test and simply repeat what they heard about it or think they know about it; they are just trying to be helpful; wrong but helpful nonetheless.) This is just for the arrogant dumbasses who act superior to the poster and call them losers or fools for not knowing how the hair drug test works but yet spew BS about the hair drug test by writing things like: hair drug tests detect every drug you ever did; or they pluck one hair or test the hair bulb; or hair drug tests detect drug usage years back!! Are you really that stupid? Yes in theory drugs can be detected in hair for as long as the length of hair; and yes hair drug tests can detect substances in mummies thousands of years back, but you forget a couple important facts: The mummy is DEAD!! Do you really know of any live person who doesn t cut their hair on a regular basis? And even if they hadn t cut their hair in 7 years; hair does fall out and is replaced with new hair over time!! It should be painfully obvious that hair drug test companies can NOT detect drugs or metabolites in the hair being tested if there are no drugs or its metabolites in the hair. Living people do metabolize drugs and metabolites at consistent, predictable rates; drug metabolites are not bacteria, they do NOT spawn new drugs or metabolites for years to come. So yes in THEORY if the drug test company has hair that has been around several years they can sometimes detect drugs from that sample if you did drugs when that hair was forming; but in reality certified drug test companies will only test the most recent 1.5 inches of hair. If you don t believe me; Look it up.

  18. QUESTION:
    will I pass my hair drug test?
    Last time I smoked was december 7 2011. About to get a job but they want to do a hair drug test, and he said it goes back 6 months. I've cut my hair numerous times since then, it's at about a 4 right now. Will I pass this test?

    • ANSWER:
      All hair drug test companies in the United States who are certified are required to follow exact procedures and not deviate from that protocol in the slightest. All probation departments, employers, and schools use certified drug test companies.

      As per certification: drug test companies will only test the most recent 1 inches of head hair; therefore, it does NOT matter if you wear your hair long, they are only testing the most recent 1 inches. Human head hair grows at a predictable rate of inch per month; plus or minus a few tenths of an inch. This gives them a 3 month detection window. If the subject does not have at least 1 inches of head hair, they are allowed to take body hair. Most body hair grows at a slower rate and therefore could (but not often) increase the detection window to about one year.

      Shaving your head hair or having less than 1.5 inches allows them to take body hair and this increases the risk of longer detection times. If you like wearing your hair long you can because it will NOT interfere with test.

      If you want to be EXTRA safe don t do any drugs that the lab is testing for within 6 months of the time you are taking the test. The reason is: 1) For any drug you do, it takes 3 to 10 days for the drug and it s metabolites that are trapped in the hair bulb to grow beyond the scalp.(You can do ALL the drugs you want 3 to 10 days before the hair drug test and the results will be negative for those drugs. But be aware some employers are getting wise to this fact and will pay additional to have a urine drug test done along with the hair drug test; you will PASS on the hair drug test but FAIL on the urine drug test.) 2) You have no idea with certainty how fast or slow your hair grows so you CANNOT assume your head hair is growing at exactly a half inch per month. If it is growing at a slower rate than the average you will have a longer detection window. 3) If you are a heavy, heavy, daily weed smoker it would be wise to give yourself an extra 30 days to drop those THC levels below the 50 ng/ml cut off level that the hair drug test is certified to test for. THC and THC COOH is stored in fat cells and does get released in small quantities into blood stream for extended periods of time but not enough will get trapped in sufficient quantity in the hair bulb to fail a hair drug test beyond a few days past the time you smoked. And this is why you can fail a blood test for THC and its metabolites months out but pass a hair drug test because trace amounts do NOT matter; THC and its metabolites need to be above 50ng/ml to fail a hair drug test. But if you smoke weed heavily give yourself extra time. Six months is good enough to pass if head hair is used and this includes a buffer zone in case your hair grows slower than you assumed.

      (I am not critical of the ones who heard a false rumor about the hair drug test and simply repeat what they heard about it or think they know about it; they are just trying to be helpful; wrong but helpful nonetheless.) This is just for the arrogant dumbasses who act superior to the poster and call them losers or fools for not knowing how the hair drug test works but yet spew BS about the hair drug test by writing things like: hair drug tests detect every drug you ever did; or they pluck one hair or test the hair bulb; or hair drug tests detect drug usage years back!! Are you really that stupid? Yes in theory drugs can be detected in hair for as long as the length of hair; and yes hair drug tests can detect substances in mummies thousands of years back, but you forget a couple important facts: The mummy is DEAD!! Do you really know of any live person who doesn t cut their hair on a regular basis? And even if they hadn t cut their hair in 7 years; hair does fall out and is replaced with new hair over time!! It should be painfully obvious that hair drug test companies can NOT detect drugs or metabolites in the hair being tested if there are no drugs or its metabolites in the hair. Living people do metabolize drugs and metabolites at consistent, predictable rates; drug metabolites are not bacteria, they do NOT spawn new drugs or metabolites for years to come. So yes in THEORY if the drug test company has hair that has been around several years they can sometimes detect drugs from that sample if you did drugs when that hair was forming; but in reality certified drug test companies will only test the most recent 1.5 inches of hair. If you don t believe me; Look it up.

  19. QUESTION:
    Why wont Manny and Floyd agree to a hair test?
    There are ways to fool a blood test and a urine test, but not a hair test. Any drug you take will stay in your system for at least 6 months with a hair test. No needles, you can take hair samples the day of and the day after the fight so why not?

    • ANSWER:
      FYI

      Hair drug testing can provide a much longer window of detection, which is useful for highly safety-critical positions where there is zero tolerance of drug usage.[20] Even if the person being tested has a shaved head (perhaps in preparation for the test), hair can also be taken from almost any other area of the body. This includes facial hair, the underarms, arms, and legs.

      Though it is often claimed that hair test cannot be tampered with, it has been shown that this is simply untrue. For example, THC does not readily deposit inside epithelial cells so it is possible for cosmetic and other forms of adulteration to reduce the amount of testable cannabinoids within a hair sample

  20. QUESTION:
    what is the best way to pass hair test?
    If someone is going to take a drug test using a hair sample what would be the best way to pass it??

    • ANSWER:
      The hair drug test does allow a company to test for a longer period of time, but don't usually detect use within the past week.Testing laboratories generally require 1.5 inches or longer for testing.Human hair grows an average of .5 inches/month, which corresponds to 30 days. So the amount of time will depend on the length of your hair and amount of hair that the company takes. (in my local LAB -0 for 1.5 inches/ 90 days back).Tt s possible that drug could be detected up to three years if company pay up.

      So..hair purifier.(Don't invest in some with small time window, can be detect).
      I use one company for my tests because there systems work for me and they cover confirmation and adulteration tests.They help with a phone consultation also.Site called drugtestfriend.com or if they are administering a hair sample test - hairtestfriend.com

  21. QUESTION:
    are all drug tests the same?

    • ANSWER:
      All drug tests have their advantages and weaknesses.

      Some claim hair drug tests are the Gold Standard; but that's just not true.

      First: they DO NOT pick up every drug you did; that is a myth. Usually they test for amphetamines, cocaine, marijuana, opiates, PCP. Although additional drugs can be tested for at additional cost.

      One major flaw in hair drug tests is they CANNOT detect any drugs approximately 3 to 10 days before test.

      So you can bang 8 gram rocks of cocaine 2 days before test and have no problem in passing. Or the day of the test for that matter.

      This is why many labs attempt to get employers to include a urine drug test on same day as hair test.

      Hair drug tests are expensive: average 0 to 0 compared with to for a lab urine test.

      Hair drug tests are NOT good at picking up low dose or infrequent use. (A urine drug test or blood test is much better at that.)

      Hair drug tests DO have a lot of false/negative and false/positive results. As much as urine drug tests; although more false/negatives than false/positives.

      It takes several days longer to get a hair drug test result back compared to 3 to 4 days for a urine drug test.

      Drug metabolites even in hair DO break down over time. Certification is 90 days because beyond that metabolites are rapidly breaking down in hair. At times there are still enough metabolites intact to fail a hair drug test but predictability becomes uncertain beyond that 90 day detection period. (That's why they try and take head hair first, then go for body hair as a last resort if head hair is to short. Body hair grows at a slower rate so detection window is up to a year but with higher risks of unpredictable test results.)

      Advantages of hair drug test:

      Very good at picking up drug use beyond low dose or infrequent use.

      Far longer detection window than urine or blood or saliva tests. (3 to 4 months depending on how fast your head hair grows. As a last resort body hair can be used and that can (not often) but can go back up to a year.

      So far, near impossible to beat. Many detox shampoos on market but not much confidence in their ability to beat the test.

      Blood drug tests do not detect as far back as hair drug tests. Actually urine drug tests are at times better than blood tests for detecting drugs at levels high enough to fail the drug test. The drug metabolites collect in excretion centers and therefore are at higher levels than in blood or saliva because the body uses the urine and digestive track to expel unwanted metabolites from body.

      So no drug test is superior to all the others; it depends on what detection times you need to check for. For example: You certainly would be wasting your money ordering a hair drug test because you are trying to figure out if a driver of a recent accident was under the influence of a drug. A blood test is what law enforcement would need to use in that case because a hair test would be useless.

      And although hair drug tests can pick up drug use further back, most employers find they catch more employees by using random urine drug tests because they are cheaper, can be tested with more random frequency and get results back much quicker too than with hair drug tests. So I don't think random hair drug tests are going to replace random urine drug tests anytime soon.

      And these saliva tests have good points and bad too. They are cheap and great at quick spot checks on employees or paroles. And for many commonly abused pills detection time is up to 3 to 5 days just like urine tests. Because they are terrible at detecting THC much beyond 6 to 72 hours tops.

      So if testing for marijuana: urine tests, blood tests, or hair tests would be best; anything but a saliva test for marijuana use because they are really poor at it.

      Too many on here thinking if THC is in system for around 30 days it must be detectable in saliva for same amount of time; but they would be wrong. THC is fat soluble; it doesn't remain long in saliva.

  22. QUESTION:
    How can you read a hair folicle drug test?
    Ex had to take a hair folicle drug test. Cut off for METH is 500 pg/mg, his was 189036 pg/mg. Is he a cronic user? How can you read the test? Does anyone know? Please advise. Thanks!

    • ANSWER:
      I would say that he is. hair sample drug testing can detect drug use for up to 90 days after use. The detection window is much larger in hair drug testing (compare it to few days for urine and saliva based drug testing) because trace amounts of drug chemicals become trapped inside each hair.
      If his result is so high...........

  23. QUESTION:
    Marijuana hair test for infrequent user?
    Hi, last week I took a preemployment hair test for marijuana. I dont smoke frequently, in fact, I used it once way back in I believe november of 2012. However, I only took like a hit or two of a blunt. Now, my bestfriend smokes all the time around me and sometimes in her car with the windows up. Should I still pass the drug test or is there no hope for me to pass?

    • ANSWER:
      A hair drug test is meant to show consistent use over time. A 1.5 inch sample of hair, cut at the scalp line, will go back 90 days. Usually an employer will do a test for a 90 day history. As far as your fiend's second hand smoke is concerned second hand smoke won't show up on a hair drug test or urine drug test. I think you should be good to pass.

  24. QUESTION:
    Passing a hair follicle drug test?
    My school does random drug tests now but i have been clean for more than the needed time that they're looking for, but im wondering if they can still detect marijuana usage due to my length of hair. Im assuming that marijuana would still be in the ends of my hair. does anyone know if this is true or not and if im gonna have to cut my hair to pass

    • ANSWER:
      You will pass.

      Many wrongly assume the lab tests ALL your hair no matter how long it is; but they would be wrong! If you think about it, it would not be scientifically ethical to test women's hair at 2 feet and men's short hair at an inch and a half. In science, one must have standards and one must employ those standards consistently, and exactly as they did the previous ones. Ever wonder why they only certify 90 days out? Its because the drugs and metabolites break down too rapidly after 90 days (yes, even in dead hair; they are not like tree rings) and they get too many inaccurate results. So drug users with long hair can rest easy; no matter how long your hair is they cut it (at the lab) from the base at one and a half inches. Much of these wrong answers comes from drug labs themselves that try to trick the reader into thinking they will test all the hair. They do that with statements like, "the detection period is only limited by the length of the hair." That's a interesting and disingenuous statement, yet still factual. It makes the reader think, the longer the hair the further back they go. And that is factual to a point. Up to one and a half inches!! See there's the catch that they leave out until a different section whereby they explain that they will only test an inch and a half of hair from the base, making for a 90 day detection window. But it causes an unastute parent to think my son's hair is 2 feet long, I'll pay to have lab test it because I can get a 2 year detection window. But unfortunately for Dad, that above statement meant, you mail in a half inch of hair from son Johnny we can only test back a couple weeks, one inch, maybe two months, and over an inch and a half, test limits remain at 90 days. So detection period is only limited by length of hair BUT up to that inch and a half. A good sales ploy though.

      Below is how test works.
      XXXXXXXX
      First: Hair follicle tests cannot pick up drug useage 3 to 10 days prior to the test. This is due to the hair not growing through the scalp in time to be taken for the sample.

      Head hair grows a half inch per month plus or minus a few tenths of an inch. If your hair grows really fast it may only take 3 days to go from the bulb, where metabolites are collecting, to then grow past the scalp, whereby it can be taken to be used in the sample; if your hair grows really slow, that process could take 10 days.

      Second: The sample that is collected contains between 30 to 70 strands of hair. No matter how long your hair is, the an hour employee who cuts your hair puts all of it in a sealed bag. At the lab, the .50 an hour tech measures and cuts hair to one and a half inches from base and throws the rest out. The one and a half inches is tested; with a possible detection time of 3 to 4 months, depending on how slow your hair grows.

      Third: In order to fail, they must get concentrations above the cut off level; so even if they detect trace amounts you will still PASS if the amount of concentration level is lower than the cut off.

      Four: Extremely small amounts of metabolites get trapped in the hair bulb as the hair cells are forming. And they do not get trapped evenly; at random, some hairs get more, some get less, and some get none at all trapped in the hair strand.

      Statistically when they get 30 to 70 hair strands the lab's odds are greater to get a hit than if they only had one strand to test. And the lab is at the nanogram level so they don't need much. But depending on which drug they are testing for, the amount has to exceed that level or you pass.

      Hair drug tests are not good at picking up low dose or infrequent use.

      The smartest call you can make is not to do any drugs in detection zone prior to an upcoming hair test; but if it's too late then you might still be safe if you kept your drug usage during detection period to a minimum.

      Too many false answers claiming guaranteed fail. Or the one I love the most is; it doesn't matter how short short your hair is because they still detect back 3 years. I guess these people think, the metabolites are like salmon and when you get your hair cut they frantically swim back down hair shaft to spawn new metabolites in hair bulb.

      The test cannot detect metabolites if there aren't any in sample. If your head hair sample is a half inch long, your detection time is 2 to 6 weeks.

      If your head hair is less than an inch and a half long, they are often authorized to take body hair. Body hair grows at slower rate and could, but not often, but could detect drug use up to a year back. It is not to your advantage to give them body hair, so don't shave your head just before the test. You are risking potentially longer detection times and more unpredictable results.

  25. QUESTION:
    how do you pass a hair drug test?
    i smoked like june 10th my test is in three weeks. i cut my hair every two weeks and shaved my whole body so all new hair can grow in will that help? they said it would go back all the way up to possibly 6 months how do i pass the tes??!! other drug test like piss i would just work out hella before and drink hella antioxitants will that work?

    • ANSWER:
      don't listen to stoners on the net . hair test only go back a max of 90 days. you are out of the window. you cut it away however shaving your body and cutting your hair is a obvious sign that you are EVADING i hope your hair gets past a half inch by test time or your screwed. as for the drinks they are fn scams and again you are out of the window if you are really paranoid google passitkit are use the synthetic urine


hair drug testing window