Glutathione Wondrous Roots Because glutathione levels decline as you age, and glycine can help slow the glutathione slide, it's a good idea to keep your levels high by eating protein rich foods, like organic poultry, grass fed An injectable hydrogel for synergistic therapy in colorectal cancer by targeting glutathione: Cell Reports Physical Science Glutathione mediated nanomedicines for cancer diagnosis and therapy ScienceDirect