At minimum for a heavy everyday smoker u r looking at 30 days. It has taken me as much as 6 weeks to clean out for a urine test. A blood test is closer to 6 mos and a hair sample is over a year.
There are so many things that are dependent like the type of test and the amount u smoke.
If I understand the article, THC stays in your hair until you cut it out of thereâŚthink haircut. That confirms another article I read in Scientific American a few years ago (sorry, but I canât locate said article).
When you smoke, vape, or eat marijuana, all youâre really doing is facilitating the release of the drugâs active compounds into your bloodstream. Once theyâre in your veins, these cannabinoids ride the blood highway to the cannabinoid receptors on the bodyâs cells, where they bind and exert their effects. Along the way, some of the cannabinoids â metabolites of psychoactive THC are what most tests look for â 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.
Active compounds from marijuana travel in the bloodstream to a strand of hair via the hair papilla in the hair follicle.Wikimedia
HOW LONG DOES IT STAY THERE?
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 youâre in the clear.
Biological tests of drug use can be used to inform clinical and legal decisions and hold potential to provide evidence for epidemiological studies where selfâreported behaviour may be unavailable or unreliable. We test whether hair can be considered as a reliable marker of cannabis exposure.
Methods
Hair samples were collected from 136 subjects who were selfâreported heavy, light or nonâusers of cannabis and tested using GCâMS/MS. Sensitivity, specificity, positive predictive value and negative predictive value were calculated for five cannabinoids (tetrahydrocannabinol [THC], THCâOH, THCâCOOH, cannabinol and cannabidiol). Samples also were segmented in 1 cm sections representing 1 month exposure and the correlation between amount of cannabinoid detected and selfâreported cannabis consumption tested.
Results
All five cannabinoids were detected. Seventyâseven percent of heavy users, 39% of light users and 0% of nonâusers tested positive for THC. The sensitivity of detection of THC was 0.77 (0.56â0.91) comparing heavy cannabis smokers with light and nonâusers, whereas the sensitivity of other cannabinoids generally was considerably lower. The positive and negative predictive value of detection of THC were 0.57 (0.39â0.74) and 0.91 (0.82â0.97), respectively. A correlation of 0.52 (P < 0.001) was observed between selfâreported monthly cannabis use and THC.
In fact yes, marijuana takes some time to disappear from your body. The effects are temporary but three always will be some remains of it until it is processed down by the body. It can take up to 30 days to get rid all of it. But there is an other way, I have read on this blog Marijuana Addiction treatment that there is a way that will get rid of all marijuana that you. I want to use it, when I will use it I will be back with an update. I am really curious about this, I want to know how it will work out.
30 days to clean out liver. Plenty of hydration. Hair will show a decline in usage which is what the courts are looking for. All body hair is usable. So if you shave your head, then hairs coming from another site. Youâll have to shave every inch to hide the hair results.