... Grade:USP, FCCIV 4.CAS No.74-79-3 L-Arginine is a semi-essential amino acid for humans and animals ... function.In time of hunger,wound or stress,L-Arginine becomes essential.L-Arginine is widely applied in the fields of pharmaceutical ... ,health nutritions,foods and feeds.Chengzhi L-Arginine is produced through fermentation with high yield rate and stable ...