Glutathione Amino Acids: Why Supplements May Not Work Glutamine and Its Actions: A Bird's Eye View Prion protein regulates glutathione metabolism and neural glutamate and cysteine uptake via excitatory amino acid transporter 3 Guitart 2015 Journal of Neurochemistry Wiley Online Library Glutathione Synthase an overview ScienceDirect Topics 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 Glycine as a conditionally essential amino acid and its relationship to l serine Metabolism Clinical and Experimental