Amazon.com: Dr. Mercola L Glycine Aids Production of Glutathione & Collagen Supports Heart, Brain, Digestion, Metabolic & Immune Health Non GMO, Gluten Free & Soy Free 180 Capsules (90 Servings) : Health Newly revealed amino acid function could be used to boost antioxidant levels EurekAlert! Glutathione is the body's primary internal antioxidant, made using the amino acid cysteine, and it helps protect cells from oxidative stress. Beyond detoxification, research shows glutathione is involved in thyroid hormone metabolism, Glutathione for Food and Health Applications with Emphasis on Extraction, Identification, and Quantification Methods: A Review
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