Li Shizhen
Li Shizhen distinguishes drugs from four types of human hair: 52.1 "fàbèi" "(esp. boy's) hair cut from the head", 52.2 "luànfà" "hair left on a comb after using it", 52.25 "zīxū" "facial hair", and 52.26 "yīnmáo" "pubic hair". Li details additional names and their corresponding pulse diagnosis acupuncture channels.