How do drugs deposit in or on hair?
A.The current scientific research indicates that drugs deposit in hair by several methods. These include transmission from the blood supply, through perspiration and skin oil. In addition, drugs are externally deposited on the hair by environmental smoke or, more reasonably, by smoke from the users own ingestion. As with the smoke from tobacco users, an individual’s hair will be more susceptible to environmental smoke from his or her own drug use activity.
