Pass a Hair Drug Test Fast: Everything You Need to Know

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 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 is essential to understand how marijuana becomes detectable in the hair and the methods to prevent it from showing a "positive" test result.

How to Pass a Hair Drug Test

Table of Contents

How long does THC stay in the hair?


New drug deposits can't penetrate dormant (nongrowing) 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 you smoked
  • How solid/potent is your weed, and what strain is
  • Your metabolism and diet
  • Your body fat percentage
  • How much you exercise and sweat

How Long THC Leaves The Body
Click to Enlarge

So remember: There is 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 testBut what exactly is a hair follicle test, and what happens during one?

What is a hair follicle drug test?

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 is 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.  

While most companies test with blood and urine samples 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. THC metabolites can be detected through a hair follicle test for as long as 90 days. This means that you need to know at least the ways how to pass a hair drug test.

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


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


Now that you are familiar with how marijuana is detected in the system and how it is detected through a hair follicle test, you're probably even more worried about passing a drug test.

Don't worry! 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.


You need to know plenty of things to pass a hair drug test. Believe it or not, you can shorten the cleansing process to a few weeks by going on a detox diet and drinking 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.

      Also, be aware that some shampoos strip the hair of any contaminants which damage your hair and render it unfit for testing. This type of shampoo may buy you more time to cleanse your system thoroughly but can also cause suspicion from the clinician or the company you're applying for.

  • You can use these detox shampoos 3-10 days in advance, but if you don't have that much time, you can take 3-4 showers daily as needed. Just let it sit in your hair for at least 3 minutes, then thoroughly massage your scalp to remove all the residual buildup.

  • Mix up a home remedy.

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


    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. 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.
    4. 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 dying kit or repeat these steps as needed.
  • Generally, these home remedies mimic the effect of detoxifying shampoos and work basically the same. Here's one you can try:

  • Shave all your hair

    This is quite a straightforward solution: It involves removing all the hair in your body with a razor and some shaving cream. You cannot 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!


The best way to know that you are fully prepared for a hair follicle drug test is to know that you will test negative. You'll be set to go through a hair drug test by knowing how to beat it. Use an at-home test kit to gauge the efficacy of the treatments that you have undergone. At-home hair drug testing kits are easy to use and can detect THC levels even for light marijuana users.

It's a bit sad that using marijuana is still frowned upon and even illegal in many places today. 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 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.


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