Made with Non-GMO Ingredients Pharmaceutical-Grade Free-Form Amino Acid Dietary Supplement Ajipure Amino Acids Vegan Kosher Parve Gluten Free 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.