The 7 Best Glutathione Foods Foods Highest in Glutathione Kale Extract Increases Glutathione Levels in V79 Cells, but Does not Protect Them against Acute Toxicity Induced by Hydrogen Peroxide Most antioxidants come from your diet. This one your body makes itself, and it's arguably the most important one you have. Glutathione supports immune function, detoxification, brain health, and digestion. The problem 8 Ways to Increase Glutathione Levels Naturally Here's What Happens When You Eat Kale Every Day, According to Registered Dietitians Amazon.com: KAL L Glutathione, Reduced Glutathione Supplement, High Absorption Antioxidant, Orange Flavor Instant Dissolve ActivMelt, Vegetarian, Lab Verified, 90 Servings, 90 Micro Tablets : Health & Household