This increase can activate PKA

Key Ingredient Glutathione Niacinamide 7 types of Giga White Extracts Ingredient Water, Dipropylene Glycol, PEG-8 Caprylic/Capric Glycerides, Niacinamide, 1,2-Hexanediol, Glutathione, Polyglyceryl-6 Isostearate, Propylene Glycol, Oxygen, Sodium Hyaluronate, Dioscorea Japonica Root Extract, Mentha Piperita (Peppermint) Leaf Extract, Primula Veris Extract, Alchemilla Vulgaris Extract, Veronica Officinalis Extract, Melissa Officinalis Leaf Extract, Achillea Millefolium Extract, Alcohol, Caprylic/Capric Triglyceride, Butylene Glycol, Disodium EDTA, Adenosine, Titanium Dioxide, Equisetum Arvense Callus Extract, Tocopheryl Acetate, Allantoin, Panthenol, Caffeine, Hedera Helix (Ivy) Leaf/Stem Extract, Camellia Sinensis Leaf Extract, Sophora Flavescens Root Extract, Rhododendron Flower Extract, Hericium Erinaceus (Mushroom) Extract, Tremella Fuciformis (Mushroom) Extract, Zelkova Serrata Leaf Extract, Hericium Erinaceus Fruit Extract, Water-Soluble Proteoglycan, Fragrance

Brain Res (1997) 752(1-2):2634
2009 GSH and NO glutathione+and+nitric+oxide Vitamin D and GSH Also, VitD acted as an antioxidant factor by increasing GSH