Glutathione Metabolism in Renal Cell Carcinoma Progression and Implications for Therapies 5 Route of synthesis of glutathione (GSH) involving three amino acids Download Scientific Diagram NAC [N AcetylCysteine] is a precursor of Glutathione. PICTURE: Glutathione is made from three amino acids and cysteine is one of them 87 studies. 9,000+ children. and most parents have never heard this conversation. A meta analysis of 87 studies involving over 9,000 children found consistently lower glutathione levels and higher oxidative stress in children