The Best Hair Follicle Drug Test Goes Back How Many Years References. Web how far back can a hair drug test detect drug use? Polycystic ovarian syndrome (pcos) dr.
Web although there is no released research or tests, it is suspected that the body hair test can be detected much further back, as far back as a year. Polycystic ovarian syndrome (pcos) dr. Web how far back can a hair drug test detect drug use?
