A hair follicle was a part of the skin that grew hair by grouping old cells together. Alfarian hair pasta was made from the hair follicles of a mature Alfarian. The follicles were harvested by Talaxians during the Alfarian's shedding season in early fall. (VOY: "Parturition") In 2151, Ah'len told Commander Charles Tucker III that the hair follicles on his face were growing. Tucker replied that he hadn't had the opportunity to shave since he had boarded the Xyrillian starship to help the Xyrillians repair it. (ENT: "Unexpected")