Dietary Supplement. Gluten free. Vegan. Made with Non GMO ingredients. Pharmaceutical grade. Free-form amino acid. Ajipure amino acid. Bluebonnet's L-Tryptophan 500 mg Capsules contain a vegetarian source of the free-form amino acid L-tryptophan called TryptoPure from Ajinomoto, the world-class, quality leader in the production and purity of pharmaceutical-grade amino acids since the 1950's. Available in easy-to-swallow vegetable capsules for maximum assimilation and absorption. Free of milk, egg, fish, crustacean shellfish, tree nuts, peanuts, wheat and soybeans. Also free of yeast, gluten, barley, rice, sodium and sugar. Bluebonnet's KOF-K Certification K-0000700. www.bluebonnetnutrition.com.