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Vitamin B12 injections can be effective for raising the vitamin B12 levels in the blood quickly for those with vitamin B12 deficiency
However, our study suggests that FUT2, through its regulation of the cross-talk between gut microbes and the human host, might explain a part of the observational association between serum vitamin B12 and BMI
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By blocking NNMT, it increases intracellular NAD+ levels, which in turn activates sirtuins (like SIRT1), leading to improved metabolism and reduced fat storage
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