Full name:5- hydroxy-l-tryptophan Specification:98% HPLC Main Application:5-HTP is helpful in treating a wide variety of conditions related to low serotonin levels,including the following: Improving in mood, anxiety, insomnia, and physical symtoms, Reducing depressing and fibromyalgia, Being effective in various types of headache and migraines, Decreasing food intake and weight loss.