Famous A Hair Drug Test Ideas. Web a hair drug test, also known as a hair strand test or a hair follicle test, involves analysing samples of head hair or body hair for the presence of drugs and their metabolites. The main difference between a hair drug test and a urine drug test is the window of detection.

Web everything you should know about a hair strand drug test understanding your results. In fact, cutting your hair may actually raise suspicion and lead to further testing. The main difference between a hair drug test and a urine drug test is the window of detection.