n- acetyl cysteine precursor of glutathione The mechanism action of N-acetylcysteine (NAC): The emerging role of H2S and sulfane sulfur species NAC (N‑Acetyl Cysteine) – FIG
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doi: 10.3390/compounds3010005 162 ZhangZLiXSangSMcClementsDJChenLLongJet al

however, 30 mM was cytotoxic in vascular smooth muscle cells, monocytes, and neutrophils, and as low as 5.0 mM NAC was cytotoxic in porcine aortic endothelial cells [17]

Cases of skin lightening treatments gone horribly wrong are not unheard of

Cancer Lett 559:216119

showed that a full complement of nephrons was never achieved in preterm as compared to term newborns and that acute kidney injury (AKI) led to further restriction of nephron endowment (45)
