Wuhan Grand Hoyo Co., Ltd., has been approved the latest GMP by China State Food and Drug Administration National in Chinese amino acid industry, currently has production licenses for Acetyltyrosine，Acetylcysteine, Cysteine Hydrochloride，Carbocisteine，Arginine Hydrochloride，Histidine Monohydrochloride, and Lysine Hydrochloride. More info