Griffonia simplicifolia is an African plant which is extracted to produce 5-HTP, the intermediate metabolite between the amino acid L-tryptophan and serotonin. Details Serving Size: 1 Vcaps® Suggested Use: As a dietary supplement, take 1 Vcaps® daily, preferably on an empty stomach at bedtime. Free of: yeast, wheat, gluten, corn, soy, milk, sugar, salt, colors, preservatives. Other Ingredients: White Rice Powder and Cellulose (capsule). Warnings: Please discard the inedible freshness packet enclosed. If you are currently taking antidepressant medications please consult a physician prior to use. May cause drowsiness. Disclaimers: None Vcaps® is a trademark of Capsugel. .