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, smelly molecule Antioxidant and Antiproliferative Activities of Several Garlic Forms The 7 Best Glutathione Foods Foods Highest in Glutathione Frontiers Traditional uses, phytochemistry, pharmacology and toxicology of garlic (Allium sativum), a storehouse of diverse phytochemicals: A review of research from the last decade focusing on health and nutritional implications Black Garlic: Evolution of the Chemical Composition and Broad Biological Activities Journal of Agricultural and Food Chemistry