So, you measure a higher B12, but part of that B12 is inactive, so useless Oral B12 supplementation, even in the form of a multivitamin preparation, may result in serum B12 concentrations just within the normal range without abolishing symptoms
Sridharan et al
This redox cycling generates superoxide, hydrogen peroxide, and hydroxyl radicals, overwhelming the limited antioxidant defenses of cardiomyocytes [71]
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