What if the donor has little or no head hair?
Even shavings from a very short (‘number one’) haircut can be tested, for a profile of drug use of about a week. If the donor has no head hair then hair from other parts of the body can be analysed – beard, armpit, chest or pubic hair. Someone who has shaved their head prior to a test can therefore still provide a sample. If the donor objects or has shaved all body hair – well, they can be offered the alternative: observed urine tests twice weekly for 3 months!