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A similar human study 15 also found that sublingual vitamin B12 increase cobalamin concentrations by about three-fold
StatPearls notes that high-dose oral B has been shown effective for maintenance, but recommendations are to always use the parenteral route in severe neurological manifestations
Excess B 12 beyond the blood's binding capacity is typically excreted in urine
Association of nicotinamide-N-methyltransferase mRNA expression in human adipose tissue and the plasma concentration of its product, 1-methylnicotinamide, with insulin resistance (in Eng)
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