Quote Originally Posted by bsynder21
Just out of curiosity how long does it take the body to stop showing signs of THC in hairs growing out of the body after you've smoked once and only once like I have? Just to be safe I'll buzz my hair mid September and shave my all body hair too except for the eyebrows then re shave whatever has grown out mid November, giving it more than enough time to grow back for the potential test in March.
THCA stops depositing into the body 2-3 days after your last smoking session. So if you shaved your head 7-10 days after that session, all new hair growth will be clean. Average human hair growth is 1\2 inch per month and most testers look for atleast 3\4 of an inch to test. So the average person will need to wait 45-60 days to ensure they have enough hair.

In your case, I wouldn't shave my body, it's totally unnecessary. I would shave your head or cut it very close to the scalp and let it grow back to atleast 3\4 of an inch for test time.

FYI, The rule of thumb for hair testing is 3 small smoking sessions(small joint, small edible, or small bowl) within a 90 day period if the hair is atleast 1 1\2 inches in length. This is the allowable amount to be under the testing cutoff levels.
Deige Reviewed by Deige on . Hair test Hi I was wondering just how the hair tests worked for marijuana. Hypothetically speaking, if a person smoked for the first time ( lets say last week) I'm wondering how long it will take for them to get clean. What I mean is if a lab needs the first 1.5 inches of hair which takes on average 90 days to grow how long will it take for none of their hair to show traces of THC? On average how long will it take the hairs on their head and body to show no traces of THC while growing? Rating: 5