5-HTP 5-hydroxytryptophan is a naturally-occurring metabolite of the essential amino acid tryptophan. 5-HTP for use in dietary supplements is derived from the seeds of the Griffonia simplicifolia plant. Supplement Facts Serving Size: 1 Cap Servings per Container: 60 Amount Per Serving 5-hydroxy L-tryptophan 100 Milligrams Directions: Take 1 Cap 3 times a day with or without food