Eat These Foods to Increase Glutathione in Your Body Vitality Medical Wellness Center Mushrooms are the highest dietary source of ergothioneine and glutathione, two ant oxidants that protect mitochondria from aging. Porcini mushrooms have the highest amount. Frontiers Agaricus brasiliensis Mushroom Protects Against Sepsis by Alleviating Oxidative and Inflammatory Response Mushrooms are full of antioxidants that may have anti aging potential Penn State University Dog Safe Snacks: What Foods Are Rich in Glutathione? Earth Buddy Pet