The effects of the oral supplementation of LCystine associated with reduced LGlutathioneGSH on human skin pigmentation: a randomized, doubleblinded, benchmark and placebocontrolled clinical trial Duperray 2022 Journal of Cosmetic Protocol used in this study: Glycine: ~100 mg kg day NAC: ~100 mg kg day Divided doses, daily, over multiple weeks The Food and Drug Administration (FDA) warns the public on the dangers associated with the use of injectable lightening agents such as glutathione and Vitamin C. In the Philippines, several health and Glutathione Depletion and Stalwart Anticancer Activity of Metallotherapeutics Inducing Programmed Cell Death: Opening a New Window for Cancer Therapy ACS Omega