This one antioxidant is ULTRA important for your thyroid function Glutathione is our body's master antioxidant meaning it's the most important and abundant one. As it relates to the thyroid, think How to Increase Glutathione to Protect Against Hashimoto's Glutathione system enhancement for cardiac protection: pharmacological options against oxidative stress and ferroptosis Cell Death & Disease Hashimoto's Thyroiditis Endotext NCBI Bookshelf Understanding the Causes of Hypothyroidism and Testing