James Parnell answered
Yes, it is entirely possible that even one use of marijuana can be detected within the hair follicles up to fifty days after usage - but this depends how well the THC (the active ingredient in marijuana) in your blood bonds to the hair cells.
If you have only used marijuana once recently, there is less chance that the THC has bonded strongly with the hair follicles.
Single use of marijuana before a hair test.
If you have only used marijuana once recently, there is less chance that the THC has bonded strongly with the hair follicles.
Single use of marijuana before a hair test.
- Regardless of how much you smoke, hair tests can usually detect drug use - sometimes up to four months after the last hit.
- But, as stated above, hair tests can be unreliable due to the problems THC sometimes has in bonding with the hair follicles.
- Because of its potential reliability issues, hair testing is only usually undertaken to perform a long-term drug test, as no other drug test can detect use as far back as hair testing can.
- It's rather difficult to know if you will pass or fail this test, but there are some hair products that claim to be able to help dislodge THC from hair cells.
