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You can also ask the supplier if it's copper-free and whether its intended for cosmetic or research use
BCN Classics GLUTATHIONE + VIT C Antioxidant Solution Benefits Treatments Product Information Vial | Antioxidant Solution Glutathione + Vit C Lyophilized is an antioxidant cocktail that replicates the skins antioxidant structure, keeps vitamin C stable in the skin and enhances its properties
Glutathione is an extremely powerful antioxidant largely composed of three non-essential amino acids: glutamine, glycine, and cysteine
Some people think that supplementing with the building blocks of glutathione, like N-acetyl-cysteine (NAC), helps to make glutathione, but this isnt always true
Passive diffusion accounts for about 1% of total absorption, and this route of absorption is unaffected in patients with pernicious anemia (3)