Trichology is the branch of medicine that deals with the scientific study of the health of hair and scalp. Trichologists themselves are not normally licensed healthcare workers, although members of the medical profession can undertake courses and/or careers within trichology. Trichology can be used in forensic studies of hairs to find suspects. Forensic trichology can determine the approximate age, body mass, race, and other important traits of the hair's owner. (Wikipedia)