What is Glutathione? What are the Benefits of Glutathione? 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, Does Glutathione Help Thyroid Health? Taking a Closer Look at the Possibilities of Supplementation Tesseract These highlights do not include all the information needed to use LEVOTHYROXINE SODIUM TABLETS safely and effectively. See full prescribing information for LEVOTHYROXINE SODIUM TABLETS. LEVOTHYROXINE SODIUM tablets, for oral use Initial 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,