Foods High in Glutathione Dr. Christina Carlyle Glutathione is such an important antioxidant in human physiology, meaning it acts to combat oxidative stress. Strategies for increasing glutathione include: Consume sulfur rich foods like cruciferous vegetables Ensure you get Foods With L Glutathione: Avocado, Watermelon, and More GoodRx 25 High Selenium Foods: the best dietary sources for this glutathione cofactor : r HealthWorks