How To Pass A Hair Follicle Drug Test In 2019?

The hair follicle drug test is usually the most dreaded one. Figuring out how to pass a hair follicle drug test is mindboggling, but it can be done.

With a urine test, you can simply use marijuana detox or even synthetic urine. With the saliva test, you can get some neutralizing gums.

The hair drug test, however, is more difficult to fool. To make things worse, the THC molecule stays in the hair much longer than in saliva or urine.

Here is a quick look at how long after the last use can marijuana be detected by different drug tests:

See why hair tests are a bother? You can be caught up to 3 months after smoking.

Because there is a lot (and I mean a lot) of misinformation around about the hair analysis, I’m going to present some quick facts about hair drug tests. Here are the big 3:

  1. One-time smokers don’t have to be concerned with how to pass a hair follicle drug test. THC gathers in hair only in prolonged use (regular smokers).
  2. Most of ‘How to pass a hair drug test’ shampoos don’t really guarantee to pass a hair follicle drug test on their own. You need something stronger to extract THC out of your hair – usually complete hair care with conditioner and purifier (shampoo alone is not enough). And even this is doubtful to work!
  3. If you shave your hair, you’re safe. Well, no – drug testers can take body hair from underarm, chest, legs. But if you shave those as well, you’re safe!

We’ll start off with more of these straight facts (because the internet is full of nonsense and people trying to answer how to pass a follicle hair test without using science) and I’ll explain the following in simple terms:

  • How does hair drug testing even work (how much hair they take and from – they take it from the root, by the way).
  • What happens if you decide to shave all of your hair before a hair follicle drug test.
    A nurse only takes 1.5 inches of your hair from the root.
  • Why using a detox shampoo on its own for a hair drug test is a bunch of nonsense and using it is not a guaranteed way to pass a hair follicle drug test. Can’t just wash it out, you need extra conditioner and, most importantly, purifier. And even this is not a 100% guarantee of passing.
  • How to pass a hair drug test with shampoo, conditioner, and purifier (This is the best chance you have for passing a hair drug test, short of shaving all over).
  • How you can test yourself if your hair is drug (THC, cocaine, meth) positive with a hair drug test kit.

In short, you’ll need a shampoo to pass a hair follicle drug test (Zydot shampoo works best because of included purifier), and optionally a drug test to confirm – so 1 of each:

 To Pass (Best Option)
Hair Follicle Shampoo
To Check (Quick)To Check (Standard)
hair follicle shampoo
Feature:Includes PurifierQuick TestLong Test
Quality:4.8 out of 5 stars5 out of 5 stars5 out of 5 stars
Avg. Review:5 out of 5 stars5 out of 5 stars4.2 out of 5 stars
Availability:Check Price Here
Check Price Here
Check Price Here

How To Pass A Hair Follicle Drug Test – Misconceptions and Facts

A good thing about a hair drug test is that usually you’re alerted beforehand – hair drug testing counts as ‘toxicology screening‘. They don’t just come in and take a sample like with saliva drug test. You have a few days to prepare. Who usually asks you to do it?

  • Your current employer. If they want to check up on you, on random or every few years as regulated by law.
  • Your future employer. Admittedly, they are usually required by law to do a hair drug test.
  • Parents, partners, you name it. They might choose hair follicle drug test because it’s nearly impossible to cheat and it gives a positive result if you’ve smoked heavily in the last three months.

Will I Pass Hair Drug Test If I’ve Been Second Smoking? No Guarantees.

Well, second smoking how heavily?

If your friends smoke and you’ve been around them for a while, you don’t have to be worried about how to pass a hair follicle drug test. You are guaranteed to pass a hair drug test because there is little to no THC in your hair. Yes, your hair might smell of weed, but even if you don’t wash it, the hair drug test will not detect any THC. Why?

THC outside the hair doesn’t matter. The inside of the hair is the problem.

THC from smoking marijuana travels from lungs to blood and via blood to hair follicles. The hair drug test doesn’t measure if weed stuck to your hair directly via smoke – it detected THC inside of the hair, where it came from being in the blood.

Even if you inhaled a bit around friends who were smoking, that is not a thing to be concerned about. The amount of THC that was transferred to your blood is minimum and will not show up on a hair follicle drug test.

How This Hair Drug Test Myth Was Born (‘Nah, it wasn’t me who smoked, yo’)

Why do some people still think second smoking will make them positive on a hair follicle drug test? Because most of the true smokers, when they tested positive, said “Nah, man, I didn’t smoke, I was just around a bunch of people who did. Second-hand smoking kills you in the end, right?”

I’ve got nothing again some good excuses because, frankly, nobody should lose their job because they smoked some. However, this kind of excuses started a myth that second-hand smoking can be detected via not only a hair drug test but urine and saliva drug tests as well.

How Hair Is Collected For A Drug Test (1.5 inches from the root)

This is what a lot of people going for a hair drug test don’t know. Usually a nurse or certified professional will take about 1.5 inches of your hair. The hair is collected from the root. That’s right, they only take 1.5 inches from the scalp.

Of course, they will chop off your hair from the root, even if you have 30 inches long hair. However, for a hair drug test, they’ll use only the beginning of the hair (the side that came from your scalp). Those are the new hair and 1.5 inches of that hair can hold THC if you’ve smoked in last 90 days (hair grows about 0.5 inches per month).

The other part of the hair is discarded and not used in the hair follicle drug test. Why? Simple because data collected from that part would not be valid. After more than 3 months, most of the THC goes out anyhow and if you haven’t smoked heavily up to 3 months before a drug test via hair, you have nothing to worry about.

One-Time Smokers Have Nothing To Worry About (Only Heavy Smokers Need To Worry)

A lot of times, the one most petrified of hair drug test are one-time smokers. You know, people who just tried it once at college.

Even if you smoked a lot during that one session, you don’t have to worry about it as far as how to pass a hair follicle drug test is considered. Yes, if you might test positive with mouth swab drug test or urine test, but for hair drug test, THC really has to accumulate in the hair for longer periods of time.

Hair Drug Test Can Be Up To 5 Times More Effective Than Urine Drug Test

This is the main reason why drug test via hair follicle is employed. It catches up to five times as many users as a standard urine test. Why?

Well, for a urine test, you can detox (you can read about to do a THC detox here). What is more, with moderate use of marijuana, after about 7 days, there will be no trace of THC in the urine anymore. In hair, the THC residue will remain up to 3 months!

There are no quick detoxes for the hair drug test (only shampoo-conditioner-purifier we’re going to talk about – and even that is questionable if it really helps). The only true way of how to pass a hair follicle drug test is to look for a shampoo with purifier (I’ll explain this a bit later).

How Long Is Body Hair Detection Time? (Over 90 Days)

Head hair drug test detection time is about 90 days. In the test protocol, they take 1.5 inches of hair from the root and test it. Because head hair grows about 0.5 inches in 30 days (1 month), the head hair drug test goes back about 3 months.

If you don’t have head hair (boldness or haircut style with no hair), the tester will take body hair ONLY from these three places:

  • Under armpit
  • Chest hair
  • Leg hair

Many people think they have to shave all of their body. Only these three places are valid for taking a sample for body hair drug test.

It is a lot easier for women to avoid this – they usually shave armpits and legs, and have no chest hair anyway. However, women are in 99% of cases tested via head hair (obviously). You find a lot more bold men that bold women (or those with such hairstyle preference).

Men, however, in most cases have armpit hair, chest and leg hair.

Body Hair Grows Slower (Accumulates THC For Longer Periods Of Time)

Take chest hair for example. How long does it take to grow to full length? Usually much more than 3 months or 90 days.

A tester will take 1.5 inches (or less) chest hair for the hair drug test. Because that hair might be growing for up to 6 months, the THC, which indicates marijuana smoking, can be found in the hair. That means that the body hair drug test can catch you even after 6 months (that is for heavy smokers, of course).

What Happens If I Shave Everywhere? (You Can’t Be Tested With Hair Drug Test)

This is also an idea and it is the 100% guarantee you won’t be caught on hair follicle drug test. Why? Because you have no hair, you can’t even be tested.

No hair drug test with no hair, right? They’ll just test your saliva or urine.

Of course, they will put you on saliva drug test or urine drug test but for that, you only need about 7 days for the body to detox itself and you can even help it with THC detox.

However, HR might get suspicious if you just shave your hair. They can’t prove anything but even if you do pass a standard urine drug test, they might shortlist you for drug testing.

Why Is Detox Shampoo For Hair Drug Test Useless? (Treats The Hair Surface, Not Insides)

Here the thing. The THC in the hair is not on the outside of the hair. You don’t get it because of the exposure to the THC-rich smoke. That could be cleaned out with a shampoo.

You get it via bloodstream feeding your hair follicles. And it is, of course, inside the hair. You can’t get it ‘out’ with just a shampoo.

I really thought this is pretty obvious when it comes to how to pass a hair follicle drug test.

That doesn’t stop people from trying to pass a hair drug test with such shampoos, though. Here is one shampoo that is being sold to pass a hair follicle drug test (on the right).

This hair drug test shampoo looks pretty cool, right? Just notice the 100% guarantee. That’s the company trying to make it much more legit that it deserves to be.

You won’t believe this, but people still buy into that.

Nevertheless, it is only shampoo. It won’t extract the THC from inside the hair.

Here are some reviews of this ‘100% pass hair drug test shampoo detox’ crap.


Well, there you have it. Of course, it doesn’t work – it’s only a shampoo! What were you thinking, were you high or something? Oh…that might be the reason. Ok, let’s cool down and see what might actually work.

Hair Drug Test Detox Shampoo + Conditioner + Purifier (Best Choice But Still Isn’t 100% Guarantee)

These detox shampoos are not all bad. They are actually quite useful IF they can penetrate into the hair. However, normal shampoo can’t do that.

When trying to pass a hair drug test, you really need to be looking at products that ensure that shampoo will actually reach the insides of the hair. Only from there THC can be truly extracted and gets your hair clean for a hair follicle drug test.

Is there a thing that does that? Yes, it’s called the purifier. This is basically a substance that penetrates inside the inner structure of the hair itself. When the shampoo is thus allowed to come inside the hair, it dissolves THC and it can be washed out.

Ensure Passing On Your Hair Drug Test (Rinse really REALLY good)

Of course, you have to wash out most of THC to test negative on hair drug test. This is why this is not a 100% guarantee method. However, you can increase the chances of getting THC out with:

  • Repeat shampooing.
  • Heavy (and I mean heavy) rinsing. Leave the shampoo on for a longer time than it says to ensure it will dissolve and wash out all of the THC.
  • Choosing the best shampoo + purifier combo.

Oh yeah, there is this thing where you have a conditioner with the shampoo + purifier combo. That actually does nothing to wash out the THC – it just makes your hair smooth and nice. So, if your goal is to pass a hair drug test, you can get things with or without a conditioner (doesn’t really make a difference).

Here is pretty much the industry standard for passing a hair drug test:

You’ll notice that this Hair Follicle Shampoo doesn’t only have shampoo but, far more important, a purifier! I can’t really stress enough how a purifier is essential for passing a hair follicle drug test. Without it, all the shampoo is going to do is clean the outsides of your hair and get your ass fired in the process.

hair follicle shampoo
2 step hair cleaning: 1) Shampoo, and 2) Purifier.

Just keep in mind to rinse really well. It’s better to rinse one more time and keep the shampoo on a bit longer than it says just to make SURE that all of the THC will go out. This is the best chance of passing a hair follicle drug test. You can get the Hair Follicle Shampoo here. Just read about how quickly it can be shipped so that it will be at your home before you have to take a hair drug test.

Test, Test, Test! (Test your hair if they are THC-positive before taking a hair drug test)

This is the common mistake people that get caught make. They could have avoided it just by checking for themselves if their hair still has THC.

There are several options why there can still be THC in your hair:

  • You used just the shampoo. Doesn’t work on its own.
  • You used a shampoo + purifier but didn’t rinse enough.
  • Thinking you’ll pass a hair drug test, you know, by doing nothing on it and just the destiny take its course.

Well, if you’re leaving it up to destiny, then you don’t really need to test yourself.

For everybody else, you can get a hair drug test kit and test yourself before taking a real test.

Hair Drug Test Kit (Expensive But Can Be Worth It For Heavy Users)

If you don’t want to leave it up to chance, you can test your hair yourself. What you’ll need is the following:

  • 1.5 inches of your hair (cut from the root).
  • A hair drug test kit. See the Hair Confirm kit for more details.
  • Follow the instructions in the kit.
Hair Confirm Regular
Hair drug test kit.

Believe me, testing yourself is the best way to know if you need to take action (such as buying a shampoo + purifier, or doing another rinse with it).

Hope You Got Everything To Pass A Hair Drug Test Now

This is pretty much it. The best option to pass a hair drug test is to shave your hair, armpits, legs, and chest. However, they’ll just give you another drug test (admittedly, you’ll pass that one with more ease).

The general take away is that you have to wash your hair with a shampoo that is able to penetrate into the hair. That’s why you need a purifier added to the shampoo if you want to pass a hair follicle drug test and this is how to do it.

Hopefully, now you’ve got all you need to know how to pass a hair follicle drug test. Just make sure you’ll pass it beforehand with a kit and you’ll be in the safe zone.

Remember. Better safe than sorry.

30 thoughts on “How To Pass A Hair Follicle Drug Test In 2019?

  • February 21, 2019 at 6:15 pm

    If I smoked like 8 times in the last two months (once a day for 4 days and then 4 random times) will I pass a hair test? My hair is short so I think they will take body hair. Thanks!

    • February 21, 2019 at 7:07 pm

      1 average joint with 0.3 grams of weed contains about 12 mg of pure THC. 8 such joints would yield about 100 mg of THC; that’s a sizable load. For the test, they take 1.5 inches – hair does grow at about 0.5 inches per month (1 inch in two months), body hair grows slowers. Given the sizable load, I would think there is a likelihood you would fail a drug test. The problem with the hair test is that it depends on several factors and you can only make a rough estimate. Hope this helps.

  • February 28, 2019 at 11:00 pm

    What do you think about if I smoked one time ( like 2 hits from a blunt) 60 days ago and then 15 days before that, I hit a wax pen a couple of times. Before that I smoked about one time a month or every two months a couple hits each time cause I am a lightweight now. Do you think I would pass a hair follicle test next week?

    • March 2, 2019 at 9:16 am

      I think you have good chances of passing the test. Only high blood concentrations of THC will allow for THC to penetrate into the hair follicles in a measurable quantity. 2 hints from a blunt and a couple of wax pen hits probably doesn’t supply enough THC into the body to sufficiently penetrate into the hair. Wish you all the luck!

  • March 8, 2019 at 4:34 pm

    Good article! Thank you!!!
    I smoked a lot, than stopped and shaved my hair after 1 week. After 6 months i habe to do hairtest. 3 times i was in room where people smoked but i disn’t. Should i pass that test?

    • March 8, 2019 at 5:19 pm

      Thank you, Johan. You shouldn’t worry about the hair test. 6 months is a long period; there are cases where THC was detected in hair follicles 3 months after the last use but never 6 months. You also shouldn’t worry about being in a room where people smoked – THC enters the hair follicles via bloodstream, not air. Wish you all the best!

  • March 13, 2019 at 2:55 pm

    I smoked a joint or two for years i quit smokin dec 31 2019. I recently found a great job and was excepted. I keep my hair about 2 to 3 inches on top and short on sides. I have about 75 days clean. And feel a lot sharper. But now im worried i have a hair drug test today. I feel i may pass. But no really sure. What do you think

    • March 13, 2019 at 4:41 pm

      Hi Bill, being 75 days clean really improves the chances of passing. In your case, you have a high probability of passing; the problem with the hair test is that you can never be 100% sure. Hope everything goes well!

  • March 21, 2019 at 2:27 am

    Hello, I’ve never smoked before but I took 2 puffs off someone else’s sweet 50 days ago and ate a brownie. I had to take a hair follicle today , Do you think I will pass it?

    • March 21, 2019 at 6:01 pm

      Up to the ‘ate a brownie’ everything was perfect. 2 puffs is nothing, a brownie is something, but for THC to be detected in the hair you would have to experience a prolonged period of time with high concentrations of THC in the blood. All things considered, you have an extremely low chance of failing a hair drug test.

  • March 28, 2019 at 11:03 pm

    I was a heavy smoker. Last time I smoked was dec 28, 2018. I am going to have a hair test in the next week or so and have now been 90 days with out smoking. I have been using old style aloe rid and also have the nexus shampoo and purifier for use the day of the test. I am bald so body hair will be used. What are my chances?

    • March 29, 2019 at 11:24 am

      The good thing is you’ve done everything that can be done when it comes to the hair test; 3-month abstinence, shampoo with the purifier as well a having no hair on the head. The chances of passing a considerable; hope it goes well.

  • March 28, 2019 at 11:49 pm

    I was wondering how soon should I do this method before the test? Also how long is it good for? without smoking of course

    • March 29, 2019 at 11:26 am

      The sooner you start using the shampoo the better. If there is a considerable amount of THC in your hair, it makes sense to start washing it out as thoroughly as possible. Without new THC coming in, the cleanse is good forever.

  • April 24, 2019 at 7:18 pm

    I smoked every few weeks a couple times a week for 5 months. I have a hair test in late june or early July. July 10th. I’ve counted from when I stopped smoking. Should I be safe with only 96 days or more?

    • April 24, 2019 at 8:15 pm

      96 days is quite a long time. For THC to stay in the hair follicles after such a long time, you would really have to hit a couple of joints per day, every day, for a prolonged period of time (a week or so). That would elevate the THC blood levels high enough so that a sufficient amount of it would be absorbed by the hair follicles and still be detectable after 3 months.

  • April 26, 2019 at 2:17 am

    6’2″ 180lbs, male, caucasion with blonde hair, actively workout. Last time I smoked was 91 days ago and was a daily smoker of maybe 2 one-hitters/per day. I have 22 days until my test so that leaves me at 113 total days abstained.. Out of all my research, its too close to call.
    Question 1) Do you think Ill pass with cutting my hair to 1.5″ before the test? Question 2) would they accept a hair sample at 1.25 inch if I cut it that low? Question 3) A little theory I had, what do you think… A month before my test I trimmed all my body hair down to the skin. Supposedly after a month the hair on your legs looks normal again. Would it be wise to just cut my head hair down to 1.25 inches, and if they dont take that, my body hair would also be clean right?

    • April 26, 2019 at 8:49 am

      You’re right, this is too close to call.
      Average hair growth is about 0.5”/month; in 113 days you should grow more than 1.5” of ‘new’ hair which will be used for testing.
      1) I would recommend doing a home hair test on your before you cut it. If it’s negative, you’re home free. If it’s positive, cutting it down to 1.5” makes sense (all the THC should be deposited in the hair longer than 1.5”). The regular Hair Confirm test should do the trick. If it’s positive, I just hope you don’t LOVE your hair too much.
      2) The standardized measure is 1.5”. All the tests and equipment are calibrated to 1.5”. I’m doubtful a good lab would accept 1.25”.
      3) Basically, if you cut down all the hair, you’re an automatic winner. After a month all the hair should look pretty normal and you would be scot-free. It’s just very inconvenient to cut all the hair everywhere.

  • May 14, 2019 at 1:38 am

    I smoked 2 or 3 times in February, before February I had not smoked in 5 months and before that I was 4 years clean. I’ve been clean for 86 days. What are my chances of passing a hair follicle if they took hair from underneath my arm?

    • May 15, 2019 at 5:49 pm

      Remarkably good. The total THC from 2 or 3 joints is negligible since it doesn’t boost the blood THC enough for the molecule to penetrate into the hair follicles.

  • May 15, 2019 at 4:26 pm

    I usually smoke a small joint once a month. The last time I smoked was on 02/17/19.
    My hair test was done on the 05/11/19. From the 02/17/19 and 05/11/19 (83Days), I cut my hair twice, I don’t know if that makes a difference.
    I haven’t received and answered from the company and I am starting to think that I failed.
    Do you think that I have chance of passing the test?
    Thank you.

    • May 15, 2019 at 5:54 pm

      Cutting hair certainly helps because you’re throwing away old THC-rich hair. The newly grown hair doesn’t contain THC if you’re not puffing it like crazy while it’s growing.
      The hair test is conducted quickly enough, the results are in pretty fast as well, however, the companies ordering the tests aren’t usually as quick. If they don’t notify you in two weeks, you might be a bit concerned, but all in all, you shouldn’t worry about companies not being expedient enough.

  • June 10, 2019 at 12:20 am

    I have a hair drug test coming up on June 12th. In the last 90 days, I only consumed weed on March 22nd. I took a few hits from a grav bong. Also, my hair has grown 2 inches around then since it grows fast. Will I be okay?

    Note: I also took a few hits from a grav bong in mid-February which is past the 90 day point. I am a very infrequent smoker nowadays, but my tolerance built up since I smoked almost daily in the spring of 2018.

    • June 10, 2019 at 9:22 pm

      Given that a few hits from a grav bong were about 80 days prior to the test, there is a low possibility it will show on a hair drug test. The amount of THC in a few hits is very low and the quantity of THC that was likely delivered into the hair follicles should be almost impossible to detect after 80 or so days. Hope everything goes well!

    • June 13, 2019 at 4:22 am

      So I smoked a blunt on February 2nd and then took two hits from a bowl April 20th. Before that I haven’t smoked in years. Will I pass hair test?

      • June 13, 2019 at 3:45 pm

        Feb 2nd is more than 100 days ago and the two hits in April wouldn’t be enough to deliver THC to your hair follicles and into the newly grown hair. You have a very high probability of passing a hair test.

  • June 18, 2019 at 4:48 pm

    I smoked about 6-8 times in the past 90 days, usually half of a joint, low-grade quality. how concerned do i need to be?

    • June 18, 2019 at 5:25 pm

      The line from Chernobyl series is quite appropriate here – ‘Not great but not terrible’. In your case, it’s really hard to say, it’s a 50:50 scenario.

      • June 18, 2019 at 5:29 pm

        thank you – how much do you think the above methods would reduce the 50:50?

        • June 18, 2019 at 5:54 pm

          The smart plan of action would be to test your hair and if it’s negative, you needn’t worry about it. If it’s positive, a good shampoo with purifier will reduce the chances of testing positive significantly. The most concerning thing is this: if the half-joints were spaced out evenly, the THC from each of them might end up in the hair and currently they are in different stages/levels of hair. The shampoo + purifier combo eliminates the THC in the outermost layers of hair (cuticle) very efficiently. However, if some of the THC is in the middle of the hair (medulla), it’s harder to reach, nigh impossible without the purifier. Hopefully this helps a bit.


Leave a Reply

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