Food High in Glutathione with Chemical Formula of Glutathione. Natural Food Sources of Glutathione Include Fruit and Vegetable Stock Image Image of liver, food: 300102829 Glutathione is known as the master antioxidant. This critical compound protects cells from damage caused by free radicals and toxins, supports detoxification, plays a key role in DNA synthesis and repair, Natural Ways to Increase Your Glutathione Levels Foods With L Glutathione: Avocado, Watermelon, and More GoodRx