NAC [N AcetylCysteine] is a precursor of Glutathione. PICTURE: Glutathione is made from three amino acids and cysteine is one of them Glutathione Dependent Pathways in Cancer Cells Glycine and N acetylcysteine (NAC) are amino acidbased nutrients that serve as precursors for glutathione, one of the body's most important intracellular antioxidants. Glutathione plays a central role in reducing oxidative stress, supporting Amino acid metabolism in health and disease Signal Transduction and Targeted Therapy Topical glutathione amino acid precursors protect skin against environmental and oxidative stress Cui 2024 Journal of the European Academy of Dermatology and Venereology Wiley Online Library