Glutathione is a natural antioxidant your body makes, and it can influence melanin production which is why its sometimes marketed for skin brightening., Oral supplements are mostly broken down in Brightening from Within: How Glutathione Naturally Reduces Hyperpigmen Setu Nutrition The Glutathione Derivative, GSH Monoethyl Ester, May Effectively Whiten Skin but GSH Does Not Does Glutathione Reduce Melanin? Glutone