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 Low cellular pyridoxal 5 phosphate levels decrease neurotransmitter and glutathione concentrations and increase susceptibility to hydrogen peroxide toxicity in SH SY5Y cells ScienceDirect Multifaceted Roles of Glutathione and Glutathione Based Systems in Carcinogenesis and Anticancer Drug Resistance Elie Hatem, Nadine El Banna, Meng Er Huang, 2017 Liposomal Glutathione 1,750 mg 120 Caps