Glutathione Foods: 10 Natural Ways To Increase Glutathione Level Plix 10 Natural Ways to Increase Your Glutathione Levels 8 Natural Ways to Boost Your Glutathione Levels Because glutathione levels decline as you age, and glycine can help slow the glutathione slide, it's a good idea to keep your levels high by eating protein rich foods, like organic poultry, grass fed 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,