Glutathione is a peptide found in plants and animals. It is a powerful antioxidant produced by the liver to protect the body against free radicals, peroxides, and heavy metals. Glutathione also... Glutathione is an antioxidant that can help reduce oxidative stress, improve insulin resistance, and fight autoimmune disease. Learn how to boost glutathione levels naturally or with supplements, and what are the possible side effects and risks. This comprehensive guide explores what glutathione is, its scientifically-backed health benefits, safe ways to increase your levels naturally or through supplementation, and the clinical evidence behind its claims. Glutathione is an antioxidant peptide that provides fight cancer and boost longevity. Learn about the best foods and supplements to boost it.