Naturally BOOST Glutathione to HEAL Hashimoto's Thyroiditis How to Increase Glutathione to Protect Against Hashimoto's 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, This one antioxidant is ULTRA important for your thyroid function , Glutathione is our bodys master antioxidant meaning its the most important and abundant one. As it relates to the thyroid, Levothyroxine attenuates behavioral impairment and improves oxidative stress and histological alteration 3 nitropropionic acid induced experimental Huntington's disease in rats ScienceDirect