The Jerry G Method to Pass a Hair Follicle Drug Test

In recent years, the hair follicle drug test has become the go-to drug test in workplaces. But that didn’t stop the cannabis community from creating ever-more-efficient methods to pass the test. Case in point: the popular Jerry G method hair test.

Go anywhere online and search “bleach hair drug test” or “hydrogen peroxide hair follicle test”, Jerry G Method will inevitably come up.  Here’s 101 on the famous DIY hair detox method to pass a hair drug test.

In addition to Jerry G, Zudot Ultra Clean offers a product designed to remove toxins from hair for drug tests. Meanwhile, Old Style Aloe Toxin Rid is known for its deep-cleaning properties, often used alongside other methods to increase the chances of passing a hair drug test.

In this article, learn more about these detoxification methods and be calm before passing your hair drug test.


Aloe Toxin Rid Shampoo + Zydot Ultra Clean

  • Is the main part Of The Macujo Method!
  • Is the main part Of The Jerry G Method!
See Deal →

Zydot Ultra Clean Shampoo

  • Shampoo and Conditioner. Internal Hair Purifying Treatment that removes medications, chemical buildup and other impurities from within the hair shaft.
See Deal →

How long weed stays in your hair shafts?

Hair follicle drug tests can detect weed for up to 90 days after the last consumption. After use, cannabinoids enter the hair follicles through tiny blood vessels, sebum, and sweat that surround the hair shaft.

Hair grows about 0.5 inches per month. That means a 1.5-inch section of hair taken close to the scalp can capture a 90-day window of drug use.  This longer detection window makes hair testing the preferred choice of employers as well as studies with moderate and light smokers. However, people who are preparing to take this test and doubt their drug-free status are looking for many different ways to circumvent this system. Among them are detox shampoos Zudot Ultra Clean and Old Style Aloe Toxin Rid, which help to mask the presence of metabolites in the hair and pass the test.

Drug  Cut off level  Appears within  Hair test cut off 
Marijuana 50 ng/mL 5-7 days 90 days
Cocaine 300 ng/mL 5-7 days 90 days
Amphetamines 1000 ng/mL 5-7 days 90 days
Opiates 2000 ng/mL 5-7 days 90 days
Phencyclidine (PCP) 25 ng/mL 5-7 days 90 days
MDMA 500 ng/mL 5-7 days 90 days
Benzodiazepines 300 ng/mL 5-7 days 90 days
Barbiturates 300 ng/mL 5-7 days 90 days
Nicotine 200 ng/mL 5-7 days 90 days
LSD o.5 ng/mL 5-7 days 90 days

How to pass a hair drug test in 2023

  • Shave everything
  • Detox shampoo such as Old Style Aloe Toxin Rid and Zudot Ultra Clean
  • DIY methods

Shave everything

Drugs typically “get into” your hair follicle within 5-7 days. So shaving from head to toe may seem like a no-brainer to cheat a hair drug test.

We hate to break it to you, but you might be in for some serious trouble. First, shaving doesn’t remove the hair follicle; it can only be removed by plucking or waxing. Whether you have new hair or not, vaping will show up in your hair follicles. Second, no hair means you can’t get a hair follicle drug test, and you’ll end up with a urine drug test.

Hair sample testing is designed to pick up moderate-to-high drug use. So, shaving your entire body might work only if you’re a light smoker. However, because every body is different, determining how much you can smoke and get away with is impossible.

Detox shampoo

Only a few hair detox shampoos are effective. Most detox shampoos fail due to their inability to penetrate the hair follicle and remove toxins. It’s easy for labs to run tests to see if you’ve used drugs. And the worst part – the 90-days testing window.

The good news? Medical-grade hair detox shampoos that get inside the hair shaft and remove drug metabolites. A good example is Old Style Aloe Toxin Rid Shampoo (it MUST be the “Old” Version).

Formulated with glycol and propylene, Aloe Toxin Rid Shampoo gets into the hair follicles and removes all traces of toxins. It also has aloe vera in it, which effectively dissolves dead skin cells on the scalp that may clog your hair follicles and promotes hair growth. At about $200, Old Style Aloe Rid Detox Shampoo isn’t the cheapest option. However, it’s claimed to be the best shampoo to pass the hair follicle drug test.

(CAUTION: The brand brought out a new version, which isn’t as effective as the old version.)

If you want to pass a drug test but don’t want to empty your wallet, we recommend Zudot Ultra Clean Detox Shampoo. This 3-part formula is well known in the cannabis community; it is the final ingredient of the highly acclaimed Jerry G Method. The good news about Zydot Ultra Clean is that its effectiveness has been studied.

Zydot detox shampoo works better for light or medium users. If you’re a heavy smoker, combine it with Aloe Toxin Rid shampoo for the best results.


Aloe Toxin Rid Shampoo + Zydot Ultra Clean

  • Is the main part Of The Macujo Method!
  • Is the main part Of The Jerry G Method!
See Deal →

Zydot Ultra Clean Shampoo

  • Shampoo and Conditioner. Internal Hair Purifying Treatment that removes medications, chemical buildup and other impurities from within the hair shaft.
See Deal →

DIY Detox

For occasional tokers, a potent hair detox shampoo is the best bet to dodge a hair drug test. But habitual tokers need something stronger to increase their chances of passing. Luckily, many cannabis enthusiasts developed DIY hair detox methods that ensure clean results.

Two DIY hair detox methods are frequently discussed in online forums:

  • Jerry G Method
  • Macujo Method

The Jerry G Method

Jerry G Method

It’s a hair detox method that uses peroxide bleach and baking soda to dissolve the cuticle. This makes it easier to eliminate THC metabolites from the hair cortex.

As an alternative to the Macujo, a popular cannabis user known online as “Jerry G” developed this hair detox method in 2008. He claimed that bleaching and re-dying the hair 10 days apart helped him beat a hair drug test. Since then, the Jerry G method or “Gman method” has grown in popularity as it has helped thousands of people pass drug tests.

The hair shaft (visible part of your hair) consists of three layers: the outer cuticle, the inner cortex, and the core medulla. The Jerry G method works by rupturing the cuticle and exposing the cortex, allowing toxins to leech out.

What you’ll need:

  • Disposable Gloves: to protect hands from harsh chemicals and drying out.
  • Safety goggles – to protect eyes against chemical splash.
  • An ammonia-based permanent hair dye kit that matches your natural hair color.
  • A bottle of peroxide bleach
  • Baking soda
  • Detox shampoo. You can use your favorite brand, but we recommend “Old Style Aloe Toxin Rid” and ” Zudot Ultra Clean.”
  • New clean combs and towels to avoid recontamination

The Jerry G method is a 10-day detox procedure and has 8 steps. Here’s how the procedure goes.

  • Stop using drugs before you begin this detox process.
  • On the first day, bleach your hair and then use the ammonia-based permanent hair dye. Bleach contains hydrogen peroxide, which tones down the natural color of your hair. whereas the ammonia in the dye opens the cuticle, allowing dye pigments to deposit onto the cortex. If you’re unfamiliar with bleaching and dying, get it done at a salon.
  • Wash your hair thoroughly with Aloe Toxin Rid or any detox shampoo. Air or towel dry your hair. Don’t use a blow dryer; your hair is already weakened enough and may not withstand the heat.
  • Bleach and re-dye your hair 10 days later. If you don’t have 10 days, try to repeat the process as close to your testing day as possible.
  • Once again, wash the bleach and dye away with a detox shampoo.
  • On test day, apply baking soda paste to the hair. Massage the scalp and hair thoroughly. Leave it for 15 minutes, and then rinse. Baking soda neutralizes the acids in your hair and detoxifies it.
  • Shampoo with Aloe Toxin rid once again to strip away THC metabolites.
  • Lastly, wash your hair with Zydot Ultra-Clean Shampoo. Allow your hair to air dry or towel dry.

That’s it. You should come clean.

Heavy smokers and those with long, thick hair might want to repeat the last three steps thrice —baking soda, Toxin Rid shampoo, and Zydot shampoo – just to be safe.


Aloe Toxin Rid Shampoo + Zydot Ultra Clean

  • Is the main part Of The Macujo Method!
  • Is the main part Of The Jerry G Method!
See Deal →

Zydot Ultra Clean Shampoo

  • Shampoo and Conditioner. Internal Hair Purifying Treatment that removes medications, chemical buildup and other impurities from within the hair shaft.
See Deal →


  • Requires fewer ingredients than the popular Macujo method.
  • Quick and quite an effective hair detox method
  • Accessible and affordable if you opt for pocket-friendly detox shampoos
  • Works well for heavy smokers


  • Harsher on the hair and skin
  • Might give inconsistent results
  • Not suitable for short-notice drug tests as it requires 10 days to complete the steps
Discard your stash and stop smoking for 24 hours before you begin to detox. Don’t do drugs at least 90 days before your test
Use only medical-grade hair detox shampoos Don’t use lice treatment shampoos as they contain piperonyl butoxide, an insecticide.
Before you begin, get new towels and hair grooming products. Don’t use old towels, combs, and other hair accessories.
Cut your hair shorter if it’s long and thick. Don’t shave your head. The lab will either disqualify you or take hair from your armpit.
Eat vitamin B-rich foods to accelerate detoxification. Don’t consume opioid medications and steroid-laden meats. They may cause false positive results.

Now, let’s go over the less invasive and probably the most popular method for passing a hair follicle test – the Macujo method. 

The Macujo method

There are two Macujo methods:

  • The original Mac method popped up on almost two decades ago.
  • Mike’s Macujo method, which can be found on websites selling detox shampoo.

Let’s stick with the original method, which was also called the Growman method.

What you’ll need:

  • White vinegar to break open the hair shaft
  • Pack of liquid Tide detergent
  • Pink Clean and Clear Acne Wash
  • Ultra Clean by Zydot shampoo
  • Old Style Aloe Toxin Rid Shampoo
  • Shower caps, gloves, goggles, and lots of water

Macujo method steps:

  • First off, refrain from any form of weed or drug use.
  • Rinse your hair with lukewarm water. Take vinegar and massage it into your scalp for 10–15 minutes.
  • Without washing, apply Clean and Clear to the hair. Put on a shower cap and leave it for 30 minutes.
  • Rinse your hair thoroughly and shampoo it twice (preferably with Toxin-Rid).
  • Next, wash your hair with a few drops of Tide.
  • Shampoo your hair again, this time using Zydot Ultra Clean Shampoo.
  • Repeat this process three times on the day before your hair follicle test.

What do Macujo method reviews say?

A lot of people who’ve tried the Macujo method say it works. However, keep in mind that it is expensive and extremely damaging to your hair and may irritate the scalp. Attempt with caution.

FAQ – Facts About Hair Drug Tests And Answers To Your Questions

Can body hair be used as a test sample in place of scalp hair?

Both scalp and body hair store drug metabolites that the bloodstream transports throughout the body. Labs collect samples from the armpit if the testee is bald or has little scalp hair.

Why has the Jerry G method failed for some cannabis users?

Following the instructions and getting abstinence right is critical to get a pass. If you keep smoking, you might sweat and get caught if the drugs in your sweat land on your hair.

Is a detox shampoo capable of removing all drug metabolites from my hair?

If you are a light smoker, a good detox shampoo like Old Style Aloe Toxin Rid and Zudot Ultra Clean should be enough to remove THC metabolites from your hair. However, if you are a frequent user, we recommend the Jerry G Method. And yes, be prepared to have your hair cut or restored afterward. Jerry G method is quite harsh.


Aloe Toxin Rid Shampoo + Zydot Ultra Clean

  • Is the main part Of The Macujo Method!
  • Is the main part Of The Jerry G Method!
See Deal →

Zydot Ultra Clean Shampoo

  • Shampoo and Conditioner. Internal Hair Purifying Treatment that removes medications, chemical buildup and other impurities from within the hair shaft.
See Deal →

Do detox pills work along with hair detox shampoos?

Detox pills work best for a urinalysis. It is more difficult to remove drug metabolites from hair than from urine. Remember that to completely remove THC toxins from your follicles, you must be able to penetrate them. The only way to do this is by using a hair detoxifying shampoo or DIY methods like Jerry G and Macujo.

Does hair dye affect a hair follicle test?

Hair dyeing has little or no effect on the majority of drug test results. Because hair drug tests detect drug metabolites in the hair shaft, external treatment of the hair does not affect the results.

According to some studies, cosmetic treatments such as bleach or dyes may reduce the detectable concentration of certain drugs. However, these reductions fall within the standard range of uncertainty for GC/MS confirmation tests.

How can I get a hair drug test if I’m bald?

While scalp hair is always preferred for a hair follicle drug test, if you don’t have any, the testers will look for hair in the armpit, chest, or leg.

Is it possible that drug metabolites could also be present in body hair?

Yes. As we’ve seen earlier, hair follicle drug testing is possible on any type of hair.

Macujo method or Jerry G –  which is the most effective hair detox method?

The most popular and successful hair detox method is the Macujo. But some heavy marijuana users claim it doesn’t work for them, and it is more expensive. Whereas the Jerry G method is cheaper and can work for heavy smokers if there are at least 10 days before the hair follicle drug test.

Is abstaining from cannabis for a shorter period going to help?

If someone tells you that abstaining from weed for a few days will suffice to pass a hair drug test, they are either lying to you or trying to deceive you. Because the detection window is 90 days here. Furthermore, a test like this will not be announced three months in advance. It would be a conflict of interest if your employer did that.

Can a hair follicle drug test detect drug use from more than three months ago?

A hair follicle drug test typically has a 90-day testing window. However, in rare cases of heavy drug use, a hair drug test can detect past usage for up to a year. You can use detox shampoos to mask the presence of drug metabolites in your hair before the test. Use Old Style Aloe Toxin Rid or Zudot Ultra Clean and stay calm.

Can hair drug testing detect one-time drug use?

Even though the hair drug test has a 90-day look-back period, detecting one-time drug use is difficult because only a small amount of the total dose is absorbed into the hair during one use.

Will bleaching your hair pass a hair follicle test?

Unfortunately, the answer isn’t quite so simple. While bleaching your hair may not always remove sufficient traces of THC to ensure you skate through unscathed, it does offer enough damage to your follicles that gives testers pause for thought. Ultimately, as no two tests are alike and results vary from person to person, if you hope “to pass a hair follicle drug test” by means of bleaching your tresses then you should definitely use detox shampoos, as Jerry G’s method suggests, to maximize your chances.

Jerry G method hair test – What do the users say?

Unfortunately, the Jerry G method has received a lot of mixed reactions. Some swear by it, while others make their opinions known on online forums; “it’s complete nonsense,” they usually say.

Positive Reviews

The Jerry G Method Review 1

This heavy smoker used the Jerry G method to clear his pre-employment hair follicle drug test. Notably, he did tweak the original technique by using Stat hair detox shampoo and blow-drying the hair.

The Jerry G Method Review 2

Another heavy smoker who got it right!

Despite having stopped using marijuana only four days before the test, this user received clean results.

Mixed review

The Jerry G Method Review 3

A Reddit user alerted all the blonde smokers out there that Jerry G might not be effective for them.


If we’re to go by the hundreds of success stories on forums and social media, the Jerry G method is just as effective as Macujo.

Yes, in any case, using harsh chemicals and baking soda will harm your skin and hair.

Stop using drugs immediately if you decide to try the Jerry G method to keep your job.

Start detoxing at least 10 days before the test to increase your chances of passing. You can also use detox shampoos as Zudot Ultra Clean and Old Style Aloe Toxin Rid. You might fail otherwise.