Which foods are highest in glutathione ? S Acetyl Glutathione is more than a whitening supplement, its a powerful antioxidant. While it is clinically proven to lower melanin index, it has so much more benefits to offer: , 1. Combats 8 Ways to Boost Your Glutathione Levels Naturally BOOST GLUTATHIONE NATURALLY Sulfur rich foods (allium + cruciferous + poultry fish beef) boost glutathione synthesis. Vitamin C raises glutathione by fighting free radicals. Selenium rich foods support glutathione production. Glutathione rich foods