Depending how long your hair is. Hair grows at about 1/2 an inch per month. So if you hair was 6 inches long they could test for the past year. 12 inches, past 2 years etc.
Drug Testing...Hair follicle test...how long does it go back?
as long as your hair
Drug Testing...Hair follicle test...how long does it go back?
depends on the length of your hair. the longer the hair the more chance you just failed a drug test
Drug Testing...Hair follicle test...how long does it go back?
A year with the hair follicle test is usual, though I believe it can go back farther.
Drug Testing...Hair follicle test...how long does it go back?
I don't know. Wish I could do one on my husband.
Drug Testing...Hair follicle test...how long does it go back?
I don't know for sure...but I know it's a couple years? At least one year.
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