Hair Follicle Drug Test
A hair follicle drug test, also known as a hair drug test, screens for illicit drug use and the misuse of prescription medication. During this test, a small amount of hair is removed from your head using scissors. The sample is then analyzed for signs of drug use during the 90 days preceding the test.
Your workplace may perform the test using a kit that’s then mailed to a laboratory. If your workplace has mandated that you take the test, they’ll likely require you to be supervised during the testing process.
You can wash your hair, dye your hair, and use styling products without affecting the accuracy of the test.
After confirming identifying information, the collector will cut between 100 and 120 hairs from the crown of your head. They can collect the hairs from different spots on your crown to avoid creating a bald spot.
If you have very little or no hair on your head, the collector might use body hair for the test instead. The collector will place the hair in foil and then in a secure envelope to be mailed for overnight testing.