10 Foods That Contain Glutathione Core Med Science 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 9 fruits with the most antioxidants, according to dietitians Harvard Street Neighborhood Health Center Pin by Lori Lovell Kohn on Health Diet and nutrition, Health and nutrition, Healthy Foods With L Glutathione: Avocado, Watermelon, and More GoodRx