s-acetyl-l-glutathione wiki S-Acetyl-L-glutathione: activities and applications_Chemicalbook and immune function S-acetyl-L-glutathione, 100 g, CAS No.

That doesnt make it a universal answer

A vitamin B12 deficiency can lead to various health problems, ranging from fatigue to permanent neurological changes

Hepatic effects that are considered adverse include death, abnormal clinical chemistry parameters, obvious functional organ impairment, DNA and mitochondrial alteration, glutathione depletion, hepatocyte necrosis, enhanced replicative DNA synthesis, generation of reactive oxygen species, and increased peroxisome proliferation (in rodents) (Williams and Iatropoulos 2002)

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