... antibiotic and a remedy for diarrhea, vomiting, and stomachache. 5-HTP (5-Hydroxytryptophan) is a chemical by-product of the protein ... mood. Physicians suggest taking a 5-HTP supplement instead of a serotonin supplement because 5-HTP can access the brain from ... depression, insomnia, obesity, and many other conditions.Functions1. 5-HTP has the effect on sleep disorders, depression, anxiety, migraine ...