Everyone says NAC can make glutathione. Wrong. Evidence against this is staring right at you. As you can see here, my wife's GCLC gene is genetically slower. Thus, she cannot convert Cysteine Full article: Role of glutathione in immunity and inflammation in the lung GSTM1: GST Enzymes and Glutathione for Environmental Toxins Glutathione: An Old and Small Molecule with Great Functions and New Applications in the Brain and in Alzheimer's Disease Mohamed Haddad, Vincent Herv, Mohamed Rafet Ben Khedher, Jean Michel Rabanel, Charles Ramassamy, The CBS Genes and Sulfur Metabolism: What to Know Gene Food