Longest window of de: Hair test offers the longest window of detection.That is 90 days in a standard test test does not detect the amount but presence of thc.The testing method measures drug molecule embedded in the hair shaft and not hair follicle.
Answered 3/23/2015
3.1k views
A long, long time: depending on how long/short your hair is. When you use many drugs/chemicals, the blood supply to the hair follicle deposits that chemical into the hair being made at that time, and that tiny "band" of positive THC (or other drug) will then grow out with the hair. If you never cut your hair, it will always be there, but with average hair growth and average rate of cutting, it will be there months
Answered 10/23/2016
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