Economy Size Non-GMO Soy-Free Clinically Studied L-Glutathione† Dietary Supplement Suitable for Vegetarians & Vegans Healthy Origins Setria L-Glutathione Reduced is a naturally occurring substance that is a biologically active sulfur amino acid tripeptide compound containing three amino acids: L-Cysteine, L-Glutamic Acid and Glycine. Our L-Glutathione Reduced is produced exclusively in Japan through a proprietary fermentation process. Setria L-Glutathione Reduced supports healthy detoxification and antioxidant function. †Setria L-Glutathione Reduced has been the subject of clinical trials for immune support, antioxidant support and skin support.