nac is a precursor to glutathione Can (N-Acetyl-L-Cysteine) Support Energy and Brain Fog in Long COVID and ME/CFS? NAC and intracellular B12 processing:

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Mergelsberg M, Willistein M, Meyer H, Strk HJ, Bechtel DF, Pierik AJ, Boll M (2017) Phthaloyl-coenzyme A decarboxylase from Thauera chlorobenzoica : the prenylated flavin-, K + - and Fe 2+ -dependent key enzyme of anaerobic phthalate degradation

However, certain types of cancer cells, including chronic lymphocytic leukemia cells, can preferentially obtain extracellular cysteine via cysteine transporters (17)

Published online on 27 June 2013

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