glutathione cysteine bad Effects of the Usage of l-Cysteine (l-Cys) on Human Health N-Acetylcysteine (NAC): Impacts on Human
Description
J Neural Transm (Vienna) 117:699705

Unexpectedly high B12 levels without supplementation warrant GP review as they may indicate underlying liver disease, kidney disease, or blood disorders

When you take NAC, your body breaks it down and uses the cysteine to ramp up internal glutathione production

Elsevier.
