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: Master Antioxidant, Reducing Oxidative Stress, and Detoxification Glutathione vs Niacinamide: Which Is Best for Glowing Skin? Dietary glycine supplementation enhances syntheses of creatine and glutathione by tissues of hybrid striped bass (Morone saxatilis Morone chrysops ) fed soybean meal based diets Journal of Animal Science and