L-Tryptophan | Shijiazhuang Shixing Amino Acid Co., Ltd. | L-Tryptophan is an essential amino acid found in high protein foods such as eggs, dairy, meat, fish, and nuts. It is important for serotonin production and proper organ function. L-Tryptophan is included in some dietary supplements and can improve athle...展开 L-Tryptophan is an essential amino acid found in high protein foods such as eggs, dairy, meat, fish, and nuts. It is important for serotonin production and proper organ function. L-Tryptophan is included in some dietary supplements and can improve athletic function. 收起 |