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The honest position is more measured

doi: 10.1016/j.molmed.2021.06.002 [DOI] [PMC free article] [PubMed] [Google Scholar] 202
B12, along with B6 and folate, help metabolize homocysteine levels

There are 4 supplemental forms of Vitamin B12 which can be found below

Researchers working with aged animal models or subjects with known hepatic or renal impairment should consider these factors when interpreting pharmacokinetic variability.

Reducing exposure while maintaining effectiveness represents a reasonable risk reduction strategy for those concerned about theoretical cancer risk
