is glycine a precursor to glutathione The structure of glutathione,-glutamylcysteinyl glycine. The GlyNAC Supplementation Improves Glutathione Deficiency,
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doi: 10.1124/jpet.116.237503
Its not recommended due to lack of long-term safety data
Alcohol Clin Exp Res 35, 2011
Testing is especially critical for those on vegan or vegetarian diets, as plant-based foods lack natural B12
