is nac a glutathione precursor N-acetylcysteine (NAC): from Clinical to Anti-Aging NAC and intracellular B12 processing:

Global Distribution: North America and Europe Lead Trial Activity Regional analysis underscores the continued concentration of clinical trial activity in North America (2,134 trials) and Europe (1,488 trials), which together account for nearly half of all studies initiated

Acetaldehyde is classified as a Group 1 carcinogen, and research has shown that ALDH2-deficient individuals who drink regularly face elevated risks of esophageal and other cancers

For example, the liposomal form has been advertised as being able to penetrate your cells

Can antioxidant diet supplementation protect against agerelated mitochondrial damage

Blue boxes represent enzymes associated with metabolic pathways that were not detected

doi: 10.1172/jci.insight.140327 44 ArmstrongCWMcGregorNRSheedyJRButtfieldIButtHLGooleyPR