The 7 Best Glutathione Foods Foods Highest in Glutathione 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 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 Benefits of Glutathione IV Fast Antioxidants Kale Extract Increases Glutathione Levels in V79 Cells, but Does not Protect Them against Acute Toxicity Induced by Hydrogen Peroxide