Changes in levels of the antioxidant glutathione in brain and blood across the age span of healthy adults: A systematic review ScienceDirect 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 Boost your body's natural detox and immunity with these top glutathione supporting foods! Extra Tip: Exercise, get quality sleep, and reduce processed foods to naturally increase glutathione levels. Follow for more healthy tips, Sulforaphane rewires central metabolism to support antioxidant response and achieve glucose homeostasis ScienceDirect