Once your hair is collected, it’s washed to remove any external contaminants, chopped up, and then digested in a solution meant to break it down into its components — largely the protein keratin, together with any other compounds that make their way into the hair shaft. Usually, that solution is put through an ELISA (enzyme-linked immunosorbent assay) screen, a laboratory procedure that uses specific antibodies to bind the target molecule of choice — in this case, THC. (More specifically, THCA, a direct metabolite of THC.)
When you smoke, vape, or eat marijuana, all you’re really doing is facilitating the release of the drug’s active compounds into your bloodstream. Once they’re in your veins, these cannabinoids ride the blood highway to the cannabinoid receptors on the body’s cells, where they bind and exert their effects. Along the way, some of the cannabinoids — metabolites of psychoactive THC are what most tests look for — enter the blood vessels that feed the cells of the scalp. There, at the interface between the vessel and the follicle cells known as the hair papilla, THC jumps the gap, entering the matrix, where actual hair growth occurs. Over the next couple of weeks, the hair from the root sprouts upward, carrying THC past the scalp, where it becomes fair game for testing for the next three months.
You smoked with your friends last weekend, but in the cold harsh light of Monday, you might be having regrets — especially if your employer conducts drug hair tests. From the moment you get high, it takes about 90 days before you’re free and clear when it comes to the THC in your hair. But exactly how long does weed stay in your hair? Here’s what you need to know.
The final concentration of the chemical in a sample of hair gives the final verdict. The “confirmatory level” of THCA that Quest Diagnostics uses is 0.1 picograms per milligram of hair. Anything above that pretty much confirms you’ve used marijuana in the past three months.
In the case of a positive test, another sample of the same hair is usually put through a secondary test that uses techniques called gas chromatography and/or mass spectrometry. These techniques, known as GC/MS and GC/MS/MS (tandem MS), are more accurate, more involved techniques that scan the sample for the “molecular signature” of the target compound.
How long does weed stay in your hair?
The dreaded hair test is one of the most used tests for finding drug users. It’s less invasive and takes less time than urine and blood tests, but it’s also controversial and has been known to cause false positives — even coming in contact with smoke can be enough to mess up your results. But until this issue is sorted out, it’s worth knowing exactly how hair tests work, especially for one of the most common drugs around: weed.
The most commonly cited number for the amount of time marijuana can be detected in your hair is 90 days. That time frame is calculated on the basis of how long it takes for hair at the root to grow past the scalp, and it takes into account the part of the hair that drug testers sample.
According to Quest Diagnostics, one of the premier drug testing labs in the United States, it takes five to 10 days before hair at the root pushes out past the scalp and into the world. In a drug test, samples are usually taken from hair 1.5 inches from the scalp. Since hair grows at about 0.5 inches per month, then you have about 3 months, or 90 days, before you’re in the clear.
Hair color — that is, hair melanin content — seems to alter the sensitivity of the test, with darker-colored hair being more sensitive to the test, according to a report from the Substance Abuse and Mental Health Services Administration. There has also been some concern about gray hair frequently turning up false positives, though more research is needed to explain why this happens.
There are a lot of variables in hair testing for marijuana that make it a very controversial way to decide whether or not a person is fit to have a job. As mentioned above, false positives are very possible. It’s still not entirely clear, for example, whether hair can incorporate marijuana-derived compounds after simply being in the same vicinity as marijuana smoke.
Then, of course, not everyone’s hair grows at the same rate, so it’s possible that your hair may rat you out for drug use far past the 90-day date if your hair grows slowly. In any case, the compound doesn’t leave your hair after that date — it simply stays in the hair as it keeps growing longer — so the only way to truly get rid of all traces of marijuana is to cut if off altogether.
How does weed get in my hair, Anyway?
How does hair testing detect THC?
It seems to depends on how it’s being used:
Nutritional link between cannabis and hair loss.This study found that people who regularly used different drugs and cannabis preferred salty and sour tasting food, whilst daily cannabis and tobacco users had a higher preference for sweet and spicy tastes.
Anogen – when hair is actively growing – The cells in the hair bulb divide rapidly creating new hair growth – this can last 2 to 7 years- 80 to 90% of your hair is in the Anagen Phase.
Catagen – This is a period of around two weeks when your hair. In this transitional phase, hair stops growing and detaches itself from the blood supply and is then named a club hair.
—- Marijuana is the greenish-gray mixture of the dried flowers of Cannabis sativa.
So does Cannabis or Marijuana cause hair loss or hair growth?
When your follicles don’t receive the blood they need for nourishment, the hair growth cycle is interrupted. This forces hair follicles to move prematurely into the Telogen or resting phase until the scalp becomes a better environment for healthy growth. And there are lots of natural ways to improve the health of your scalp, including Daily scalp massage Essential Oils and It Really Works Vitamins This is a formulation that I developed myself and we were voted Best Hair Regrowth Product for Men by Shortlist Magazine:
When this happens, oxygen as well as all the nutrients, vitamins and minerals from the fruits and vegetables you’re eating – they go into your blood, never make it up to your scalp. Your scalp isn’t nourished and hair loss continues. To keep hair healthy, it’s really important to maintain healthy circulation. Smoking marijuana interferes with healthy circulation. Smoking releases thousands of harmful substances called toxins into your blood. These are absorbed into the bloodstream and dispersed all over your body including the scalp. As well as interfering with testosterone levels these toxic chemicals shrink blood vessels and impede blood flow. I have a playlistall about blocking DHT and removing it from your scalp. I’ve written up everything into my gorgeous little Ebook – Everything You Need to Know to Block DHT. I’ve got a shopping list in there of all the best foods, teas, snacks that help to block DHT. I’m also really into my homemade remedies – oils, scalp massage. And an exfoliating scrub that literally lifts off DHT from your scalp and hair follicles..
Eating lots of junk food or sugary food leads to Nutritional deficiencies. These speed up hair loss, as hair shafts are weakened – they cause breakage to the hair and slow regrowth.
There are three main phases of hair growth:
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It’s the most popular illegal drug in The UK. 30% of adults aged 16 to 64 in England and Wales, 30% have tried the drug at least once see.
They found that young men in particular were prone to some of the more negative effects of smoking this drug and hair loss was one of them.
So to sum up, smoking, vaporizing marijuana can indeed contribute to hair loss.
The Link Between Smoking and Hair Loss?
Take two tablets per day for healthy, strong hair growth. And you can try us risk free – we refund you if you don’t love your results. We’re cruelty free, Vegan friendly and have zero side effects We deliver worldwide, most of our customers aren’t from The UK. Most of you guys are in The US, Australia, Canada, across Europe, UAE, Malaysia is also a big one. Check us out at It Really Works Vitamins.com and use our coupon code: YOUTUBE15 for 15% off your first full priced order. A study carried out by researchers at The University of Debrecen in 2007 also found that endocannabinoids and exocannabinoids found in marijuana restrain the growth of the hair follicle and trigger hair loss. In very simple terms, taking in cannabinoids may inhibit the proper development and growth of the human hair shaft and induce hair loss.
Telogen – This phase begins with a resting period, where club hairs rest in the root while new hair begins to grow beneath it. This phase lasts for around 3 months. After this time, the resting club hairs will fall out to allow the new hair to come through the hair follicle.
Just like Castor Oil and Argan Oil CBD oil contains a significant amount of omega fatty acids, including 3s, 6 and omega 9. These oils keep your scalp and hair healthy and nourished. A healthy fertile scalp is the best possible environment for healthy hair growth, which prevents balding from hair loss. CBD oil, just like other essential oils and carrier oils, coats the hair follicle in a protective sheath, which helps to protect against breakage and environmental factors such as pollution and UV damage, that can also dry out your hair.
Stop smoking marijuana. Eat nutritionally dense food.
So let’s discuss the various ways Marijuana can cause or speed up hair loss:
Some people seem to think that marijuana can lead to hair loss.
Is it true? Marijuana and hair loss? Keep reading!
Nixing your smoking habit could help your hair health.
The Connection Between Marijuana and Hair Loss.
You’ve likely seen biotin gummies on Instagram or in the supplement aisle of your local drugstore. They’ve become a popular product because it’s thought they encourage hair growth.
According to researchers (and as mentioned earlier), there may also be a link between smoking cigarettes and hair loss.
One of cigarettes' negative effects is that it has been found to damage your strands.
There are also some studies that seem to suggest that smoking weed could cause certain conditions that may lead to hair loss.
The final word on weed and hair loss is that there is no final word. There is one study that suggests that THC can build up on hair shafts, damaging the strands.
This topical treatment comes in liquid and foam formulas. Minoxidil is an FDA-approved medication and it doesn’t require a prescription.
Remedies for Hair Loss.
A 2019 review of studies on minoxidil affirmed that it improved hair growth in both men and women who suffer from pattern hair loss.
So, if you get high quite often and end up filling yourself with junk food, you may not get enough of these vitamins and your hair health could suffer.
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Cigarettes have been found to damage the DNA of your hair follicles, and smoke is a pollutant that can damage your hair.
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Researchers have also found a link between smoking cigarettes and hair loss.
And there are also some studies that show that the effects of smoking marijuana relate to issues associated with hair loss.
We’ll give you an answer on weed’s impact on hair growth and loss — plus, provide some proven methods to combat hair loss and encourage regrowth. Read on for healthier hair.
It’s important to note that it took a lot of leaps to get to these hypotheses (and that’s what these are), and there is no conclusive evidence proving that marijuana smokers don’t get enough zinc or iron in their diet.
If you’re concerned you’re not getting enough in your diet, a biotin supplement could help.