How to Pass a Hair Follicle Drug Test

PUBLISHED: Tuesday, November 28, 2023 by Testclear

Are you looking for a way to get marijuana out of your system fast? Do you want to know how to pass a hair follicle drug test? Then you've come to the right place.

We're here to help you pass a hair follicle drug test - the fastest-growing method employers use to detect marijuana.

To best prepare for these tests, it’s essential to understand how marijuana becomes detectable in the hair and the methods to prevent a "positive" test result.

How to Pass a Hair Drug Test

Table of Contents

Why Are Hair Follicle Tests Conducted?


Hair follicle testing is performed for different reasons, primarily for employment practices or legal procedures.

Like other drug tests, it involves taking hair samples (hair follicles) to detect drug use. The sample is sent to a testing laboratory to determine the presence of illicit substances like drug metabolites with a positive result.

Drug tests are typically conducted as a form of workplace safety measure for the following scenarios:

  • Initial screening of recruits
  • Part of the mandatory hiring process
  • Investigation of a workplace accident
  • Routine random drug testing

A positive result won’t necessarily get you fired, but it may lead to negative consequences. Some penalties for failing hair follicle drug testing include being disqualified for employee benefits or losing worker’s compensation claims.

How Long Does THC Stay in the Hair?


A 1.5-inch hair sample from the head or the body can usually trace drug use as far back as 90 days or even longer, though the detection window also depends on the person tested.

Several factors can affect how long THC stays in your system, such as:

  • How much and how frequently you used
  • How you ingested it (method of consumption)
  • How solid/potent is your weed, and what strain it is
  • Your metabolism and diet
  • Your body fat percentage

Note: New drug deposits can't penetrate dormant (nongrowing) hair.

How Long Does It Take for THC to Leave the Body?


THC can take up to 90 days in hair before completely leaving your body. This depends on various factors and the biological sample tested.

The table below goes over the general timeline for the body’s natural detoxification process to kick in. Timelines will vary mainly on a person’s physical well-being and frequency of marijuana usage.

How Long THC Leaves The Body
Click to Enlarge

Keep in mind that the figures above are rough estimates. There’s no definitive time frame for how long THC remains in your body.

With that in mind, it's essential to start preparing for your hair follicle test as soon as possible by knowing how to beat a drug test.

But what exactly is a hair follicle test, and what happens during one?

What is a hair follicle drug test?

If you want to know how to pass a hair follicle drug test, you must understand how it works.

A hair follicle test is a type of screening that uses a small sample of hair to identify the presence of THC metabolites and other drugs.

It’s one of the most popular testing methods for companies because of its high level of accuracy. This means it's pretty hard for you to pass a marijuana drug test if you recently had some.

While most companies conduct blood and urine tests to check for recent drug use, the hair follicle test can detect long-term drug use. Human hair can store a longer history than urine and blood, where the drug is flushed from the system in weeks.

How Does a Hair Follicle Drug Test Work?

A clinician cuts a small sample of your hair, about three clumps with approximately 50 strands each. The hair grows about .5 inches per month, so about 1.5 inches of hair is taken as a sample.

The sample is usually taken from the back of your head to protect your hairstyle. If you are bald, samples may be obtained from other body parts.

Then, the sample is screened for drug use of various illicit substances, including THC.


Here are some steps you can take to pass a hair drug test 

Here Are Some Steps You Can Take to Pass a Hair Drug Test


Being familiar with how to pass a hair follicle drug test can make you even more worried about passing a drug test.

You need to know plenty to pass hair drug tests. But don't worry! We’ll help you through each step.

Here are some steps you can take to pass a hair drug test:

  • Cleanse Your Blood and Hair Naturally

Since marijuana is carried to the hair follicle through the bloodstream, it is essential to cleanse your blood of toxins. It takes 30 days for the toxins to leave your bloodstream

Once your blood is clean, your hair shaft will be as well. After three months, your hair will have grown 1.5 inches longer, and you will have pure collectible samples.

  • Hasten the Cleansing Process Through Diets and Supplements


Believe it or not, you can shorten the cleansing process to a few weeks by following a detox diet and taking a daily regimen of herbal supplements.

Niacin or Vitamin B3, for instance, triggers the production of histamines and causes blood capillaries to dilate, allowing more toxins to be eliminated. Drink as much water as possible daily and sweat all the toxins in a sauna or gym.


    • Cleanse Your Hair Temporarily

      If you're pressed for time or failed to do a cleansing diet before your drug test, use the #1 hair detoxification shampoo - Old Style Aloe Toxin Rid Shampoo.

      Detox Shampoos are designed to remove metabolites and all those older layers of oil from your scalp without damaging your hair. They penetrate the hair shaft's inner structure to release, dissolve, and remove the toxins that have been encapsulated.

  • You can use these detox shampoos 3-10 days in advance, but if you only have a little time left before your test, you can take 3-4 showers daily as needed. Let it sit in your hair for at least 3 minutes, then thoroughly massage your scalp to remove all the residual buildup.

    Safety tip: Be aware that some shampoos strip the hair of any contaminants that damage your hair and render it unfit for testing. This may cause suspicion from the clinician or the company you're applying for.

  • Cook Up a Home Remedy

    Home remedies also cost a lot less but take more prep time. Most involve inexpensive ingredients commonly found in your kitchen cupboard, such as lemon juice, baking soda, rosemary oil, vinegar, sea salt, and detergent.


Generally, these home remedies mimic the effect of detoxifying shampoos and work basically the same. Here's one you can try:

    1. Begin by saturating your hair with white vinegar and let it sit for 15 to 20 minutes.
    2. Next, soak your hair with a salicylic acid acne treatment.
    3. Lather your hair thoroughly with one cup of liquid detergent.
    4. If you don't have liquid detergent, add a dash of water to 1 scoop of powder detergent to make a paste and use that instead.
    5. Rinse all the products out of your hair, but do not wash or condition them.
  • For added measure, you can dye your hair using a store-bought dyeing kit or repeat these steps as needed.

  • Shave All Your Hair

    This straightforward solution involves removing all the hair on your body with a razor and some shaving cream. After all, you can’t submit a sample if you're bald from head to toe.

    But be warned: Most clinicians know this trick and may fail you if you can't submit any hair sample.


ONE MORE THING... Before the drug test, check yourself!


ONE MORE THING…Before the Drug Test, Check Yourself!


The best way to pass a hair follicle drug test is to be sure you will test negative. You'll be set to go through a hair drug test if you’ve already beaten it once.

Use an at-home test kit to gauge the efficacy of the detox treatments you’ve tried. These hair drug testing kits are easy to use and can detect THC levels even for light marijuana users.


Be Proactive With Drug Test Results

It's a bit sad that using marijuana is still frowned upon and even illegal in many places today. This is why many people need to know how to pass a hair follicle drug test for various reasons.

People should not have to detox after enjoying a weekend or worry about random drug tests, but that's the reality of our world today.

Hopefully, we've helped you learn a few tricks on how to pass a hair follicle drug test. With these tips, you can avoid getting robbed of employment opportunities and remain the effective individual you are.