Glutathione can be found in plants and animals. It is a peptide made up of three amino acids: Glutamic acid, Cysteine and Glycine. Glutathione is an important water-soluble antioxidant. L-Glutathione is a biologically active, naturally occurring tripeptide composed of L-Cysteine, L-Glutamic acid and Glycine. This product is suitable for vegans and kosher. Ingredients:Each vegetable capsule of Solgar L-Glutathione 50mg provides: L-Glutathione 50mg. Natural ingredients:Microcrystalline cellulose, magnesium stearate. Capsule shell:Hydroxypropylmethyl cellulose.Directions:As a food supplement for adults, one (1) vegetable capsule daily with juice or water in between meals, or as directed by a healthcare practitioner.