Awasome Hair Follicle Test One Time Use Ideas. This window can vary depending on the rate of an individual’s hair growth. Web hair follicle tests typically utilize the most recent 1.5 inches of growth, which offers a detection window of approximately 90 days.

Web hair follicle testing provides a far superior detection rate which in turn reduces costs incurred through false testing, accidents and general workplace issues that arise from. It provides accurate details regarding a person’s past substance use. Web hair tests usually use the hair follicle, the part that attaches the hair to the scalp, to test for cocaine.