DISCLOSURE: As an Amazon Associate, I earn from qualifying purchases.


j wilson eyes wide open

My name is Jay Wilson, but my friends call me JZ for short.

Originally from Atlanta, I now live in Denver, CO where things are a bit ‘freer’ these days. During the day, I code websites and mobile apps for a living.

I put this site together for a friend who asked me to search Google to answer his question one night about drug tests.

He was scheduled for a hair drug test at work the following month, and wanted to know if there was any way the test could be beat.

I tried Googling ‘hair drug test’ and found some older forum posts plus LOTS of hot air and junk sites pushing various products and services.

The worst part was I was doing all of this on my Samsung S4 – and none of the sites I found were remotely useable on my phone!

After a few minutes of getting frustrated, I decided to spend much of the following week researching the subject completely. Then, I put up a new mobile-friendly website with what I learned so others in my position won’t get frustrated with the crap out there on the web. This website is the result.

All of the methods, products and services I mention on this site must have plenty of documented, authentic happy customers – or I won’t list them.

Best of luck on your next hair test!

– JZ


  1. Paul
    January 17, 2015 @ 7:43 pm

    this has been great information. I have smoked within the past 90 days and a job I really want is asking for a hair drug test with Psychmetrics. Is what you have described really works? I have Hair Toxin shampoo. Or am I fighting an uphill battle and have no chance in passing.


  2. Rob
    January 18, 2017 @ 4:04 am

    Hey Jay!

    Can someone smoke say couple hits a couple times a month and it still not build up enough to pass through to hair?

    What about just a couple hits 1 time a month?

    Just trying to figure out what amount can be smoked semi-regularly without risk of failing – of course abstinence should be the name of the game ha.

    Any insight would be appreciated.

    -Rob (l wont bother you any more!)


    • Jay Z.
      January 20, 2017 @ 4:33 pm

      Smoking more than 3 times over the prior 90 days, and you start to risk testing positive. Sorry, but THC is really stubborn that way.


  3. Simpleton
    July 28, 2017 @ 6:19 am

    I did like 3.5 grams of coke on may 20th I have a hair test Monday which is July 31st. Will i pass my hair test?


    • Jay Z
      July 31, 2017 @ 9:44 pm

      I would be surprised if you fail.


  4. Stanky
    October 26, 2017 @ 9:59 pm

    Hey JZ,

    Great stuff on this site, thanks for putting it together. You really have helped back off the cliff the last couple of days. That being said, wanted to run by situation to your community to see what you think.

    Accepted big time job offer; contingent on “successfully completing a pre-employment screening” (some ambiguity with “successful”).

    Physique: 6′, 215lbs, ~25% body fat. Dark, thick hair. Decent amount of body hair (that never gets cut). Hispanic of European descent. Slowish metabolism. Have been doing HIIT spin 3 times/week for about 2 months now.

    Been about 7 years since I was a regular weed smoker. Smoked about a blunts-worth (don’t remember the exact quantity) about 2 years when I was visiting a friend in Seattle. Visited that same friend this past August (end of the month) and smoked again (the novelty of legal weed just got to me). Potent stuff, ~27% THC and ~6% CBD; two blunts about 1g each. First sitting (~12pm), I smoked about 50% of one by myself. Split the rest with my friend later that night (~9pm). Next night we smoked about the 40% of the other blunt. That amounts to roughly smoking one, 27% THC blunt over the span of ~32 hrs. Been clean since.

    On 10/10/17 I got a hair cut, leaving the longest section about 1″ – 1.25″. Was not anticipating a drug test at the point (actually got a hair cut for the interview).

    I had my hair follicle test on 10/24/17 (didn’t read the order and assumed it would be a piss test….I know, fml right). The collector sampled the back of my head near an area that my hair fades a hair cut from about .25″ to about 1.5″. After some careful inspection, my girlfriend was able identify the collection spot and noticed that some of the hair sample was not taken directly to the scalp and maybe a .25″ or so were left.

    I know there is nothing I can do at this point but the suspense is killing me. Also, thought I would provide a data point on whether I pass or not. Biggest concern with getting a positive result is the potency of what I smoked. I am also not sure about whether the quantity and time lapsed between uses can be considered as a single use.



    • Jay Z
      October 28, 2017 @ 7:13 pm

      Wow, thanks for the detail – it helps. I’d say you’d be fine after smoking one blunt in the past 90 days – except for that 27% THC concentration… kinda equals 2-3.

      Given this, I’d say you are at risk but still on the better side of passing.

      Let us know how your test turned out!



  5. Jim
    October 31, 2017 @ 11:34 pm

    Asking for a friend here, thanks in advance:

    6’3 265 lb. Male
    Light activity
    Slower Metabolism
    Hair is short and light brown

    2 hits of MJ from vape pen 110-130 days ago
    1 MJ joint smoked (low potency) 80-90 days ago

    This guy hasn’t done any other drugs or things like this in ages and hasn’t touched anything since, except a few cigars. He is freaking out because he has a couple tests coming up:

    Hair test – do you think he passes? Probability?
    Urine – do you think he passes? Probability?

    Also – do you think it is necessary for him to do extreme hair treatments? Anything else you would recommend?

    Thanks for helping this suffering person…

    Thank you,



    • Jay Z
      November 2, 2017 @ 8:59 am


      No, I don’t think your friend is at risk of failing a hair or a urine test. Best of luck to him!


  6. Jennifer
    January 7, 2018 @ 8:29 am

    I may have to do a pre-employment screening mid to late January. I had a weekend where I did a couple lines of coke each day with the last use being on December 20th. What would you recommend? If I buy the old style aloe toxin rid shampoo, do I need to wait untilright before the test to cleanse my hair. I would like to use a home test to insure the shampoo worked before I get screened by the employer. If I fail there is a potential I could lose a license to work in that field so it’s high stakes. I’m really trying to gage if i need to not take the test and turn down the job. Also I was considering buying the shampoo and also using the macujo method. Any input helps. Thanks!


    • Jay Z
      January 9, 2018 @ 12:29 pm

      Given your situation, I’d def. try the Macujo or Jerry G. Do the procedure several days in a row right up until the day of your test.

      Wishing you the best possible luck on your test…


  7. JV
    March 7, 2018 @ 7:25 am

    Hope you are well, sir. You’ve done a really nice job with the website – the resources, insight and information have been enlightening to say the least. I appreciate you. I am hoping to get the subject matter expert’s opinion about my personal situation…

    The last date I smoked THC was on 9/10/17 (give or take a couple days). I also smoked a few bowls each week the month of August 2017 Don’t think I smoked much, if any, for that previous year though. Since 9/10/17, I’ve gotten my hair cut a few times and will be doing so again the day before my test (the test is on 3/8/18). It is my understanding that the clinic will test “at least 6 months” but potentially closer to 12 months. What are my chances of passing the hair follicle test?

    Really appreciate your insight and feedback.



    • Jay Z
      March 9, 2018 @ 9:58 pm

      It depends on how long your hair is, when you get tested. If you cut your hair down to 1.5″ before the test, you will test clean – but they won’t be able to look back beyond 90 days, either (no matter what the lab order asks for).

      Suggest you get a new hairstyle before the test. Plenty of good looks out there w/ 2″ of hair 😉


  8. Avg Joe
    April 25, 2018 @ 7:59 am

    My friend had 2 edibles 139 days ago, he is not a frequent user, the last time was almost a year ago. Would he pass or fail? He is a Latino male, 5’5, atheltic physic, barely any body hair, dark thick hair and he also hits the gym 4-5 times a week.


    • Jay Z
      April 27, 2018 @ 9:34 pm

      Yes, I think he will pass. 2 edibles are not enough to fail.

      Edibles metabolize more slowly than inhalants, so the peak concentration of THC metabolites stays lower than w/ smoking (but remains in your blood longer).


  9. Anonymous
    October 4, 2018 @ 9:56 pm

    I quit smoking 1/9/18 haven’t smoked since, I had a leg and armpit Psychmetrics hair test for a dream job on 10/3/18. I shaved my body hair once one 8/15/18 and again 8/30/18. I think I have a good chance but I just need some reinsurance, what do you think you think I passed?


    • Jay Z
      October 12, 2018 @ 8:30 pm

      Yeah, you should pass. It’s been far too long since your last hit. Let us know!


  10. Markus merk
    October 8, 2018 @ 9:48 pm

    Hi , the last time i smoked , it was july 24th, i used to smoke everyday, i shaved my head and body completly on august 14th , i have been clean for almost 75 days , let say if i have a hair drug test next month,will i pass?they say the test is looking for 6 months back ,thank you.


    • Jay Z
      October 12, 2018 @ 8:24 pm

      You are definitely at risk for failing your 6 month look-back hair test.

      First of all, you will only have maybe 2-3 months of hair on your head when you walk in, which won’t be enough to look back 6 months.

      So they will likely take samples from your body hair (armpits, arms, legs). But if you shave all of that off, there’s not enough sample for them to take.

      Given your heavy recent use, that’s still probably the right way to go – but they may fail you due to lack of samples/shaving.


  11. Kevin J
    January 27, 2020 @ 7:13 pm

    Good afternoon, i haven’t smoked since July 21, 2019. I don’t have enough head hair to test. I understand that body hair holds about a year’s worth. I shaved my chest hair about 2 months ago and it grew back. I have an interview tomorrow. Do you think i can pass with my new growth chest hair being long enough?


    • Jay Z
      January 28, 2020 @ 11:12 pm

      You should be good to go (ie, you should test clean). Best of luck!


Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.