Not because of microbial contamination (bacteriostatic water prevents that), but because oxidative degradation accelerates logarithmically after the 4-week mark
Warning: External use only
N Engl J Med 373(22):21172128 Zong Y, Zhang CS, Li M, Wang W, Wang Z, Hawley SA, Ma T, Feng JW, Tian X, Qi Q, Wu YQ (2019) Hierarchical activation of compartmentalized pools of AMPK depends on severity of nutrient or energy stress
10.1016/j.copbio.2011.11.014 510 SakiyamaY.MazurA.KapinosL
Uses of Glutathione Supplements 7 Health Benefits of Glutathione Tablets Protects Body Cells from Damage Combats Fine Lines and Other Signs of Ageing Imparts Glow to the Skin Diminishes Dark Spots and Pigmentation Boosts Cellular Hydration Reduces Skin Inflammation Levels Makes Skin Complexion Even-Toned Foods for Natural Glutathione Production Strawberries: Juicy strawberries are packed with vitamin C and antioxidants that help support the bodys natural glutathione production