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Can a hair follicle test detect when marijuana was used?

April 26, 2017detect follicle hair marijuana Mathematics Medicine Test Used

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Can a hair follicle test detect when marijuana was used?

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Hair follicle tests are the most accurate tests and can detect marijuana months after your last use.

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Yes, from a hair follicle test it can date back about 6 months from drugs. Even if you were to shave your head you wouldn’t get down to the root so when it would grow out the follicle would still come out positive.

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Yes i have heard of a hair follicle used to drug test.

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Yes, it can—- Roughly. And a lot depends on the length of your hair as they don’t usually use a section shorter than 1-1/2 inches. An entire hair can be cut into segments and tested, and if THC only shows up near the end, It indicates that you used it it the past.