How are drugs detected in a hair follicle (Hair Test)?
A. A simple scientific fact: drugs, which are ingested, circulate in a persons bloodstream which nourishes the developing hair follicle. Trace amounts of drug toxins become entrapped in the core of the hair shaft in amounts roughly proportional to those ingested. These traces remain in the hair as it grows out from the head at a rate of approximately one-half inch per month. A person’s drug usage history can be obtained from the hair of any individual. Drug use can be detected from months, even years past, depending on the length of the sample. Standard tests currently provide at least a 90 day history of drug use.
