Dietary Supplement Nutricost® Quality Guaranteed Vegetarian Product GMP Compliant Facility Non-GMO Product Third Party Tested Gluten-Free 5-HTP (5-Hydroxytryptophan) is a compound that is produced internally within the body from tryptophan, which is an amino acid. Many people find that they need more 5-HTP in their diet. Try supplementing with Nutricost 5-HTP capsules today and see what it can do for you!