A hair follicle drug test takes a small hair sample for testing. The results of the test will determine any drugs that have been in the body for the past 90 days. The bloodstream inserts trace amounts of these drugs into the follicle of the hair after the drug has been processed.
What Will Show Up on a Hair Follicle Drug Test?
January 4th, 2010 
passhair 
Posted in Pass A Hair Drug Test 