glutathione peroxidase and reductase reaction Cycle. Glutathione converts H2O2 to Glutathione peroxidase (GPx) redox cycle.

McKenna and Ferreira 2016)

Cells have evolved a complex antioxidant system, formed by enzymatic antioxidants, such as superoxide dismutases (SODs), catalase (CAT) and glutathione peroxidases (GPXs), thioredoxin (Trx) as well as low molecular antioxidants, whose concerted action is balancing the level of oxidative stress (Halliwell 2022)

Wan M., GrayGaillard E

Nashawi H, Gustafson TJ, Mietlicki-Baase EG

[DOI] [PubMed] [Google Scholar] 58.Toliins J.P., Shultz P.J

It is not known what proportion of people with acne are sensitive to vitamin B 12 , and this study does not answer that, nor whether those people should limit B 12 intake