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 Frontiers Identification and Comprehensive Genome Wide Analysis of Glutathione S Transferase Gene Family in Sweet Cherry (Prunus avium) and Their Expression Profiling Reveals a Likely Role in Anthocyanin Accumulation Glutathione Glutathione S transferase Wikipedia Inborn errors in the metabolism of glutathione Orphanet Journal of Rare Diseases Springer Nature Link Glutathione system enhancement for cardiac protection: pharmacological options against oxidative stress and ferroptosis Cell Death & Disease