7 Foods Rich In L Glutathione that You Must Eat NOW! Mark Below are my top tips for boosting glutathione levels. Eat sulfur rich foods. Glutathione contains a sulfur chemical group, which is kind of like its secret weapon. Sulfur is a sticky, Food rich in glutathione: broccoli, cauliflower, banana, spinach, carrot, orange, avocado, onion, nuts. Glutathione is an antioxidant; helps make proteins in the body; has a variety of health benefits Stock Photo TRUERX Rich White Glutathione 14 Sticks (14 day supply) OLIVE YOUNG Global