What's 5-htp, and is it an implication for weight control, social anxiety, and depression?

No go. 5-htp is a precursor to tryptophan the Amino Acid used to create serotonin. The national institute of health recommends not to use 5-htp until more is known. 5-htp might be unsafe. Some people who have taken it have come down with eosinophilia-myalgia syndrome (ems), a serious condition involving extreme muscle tenderness (myalgia) and blood abnormalities (eosinophilia).