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When NNMT is active, it methylates nicotinamide (a form of vitamin B3), making it unavailable for conversion into NAD a crucial molecule for energy production and cellular repair

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doi: 10.3390/nu9010001, Summary Keywords vitamin B 12 , health care, hospitalization, public health burden, clinical diseases Citation de Carvalho LP, Akamine N, Di Pietro MS, Frana CN, Oliveira R and Lopes RD (2026) Vitamin B 12 deficiency and its impact on healthcare: a population-level analysis and call for action

When the reactants and products of a half cell are in their standard state and the voltage is determined relative to a standard hydrogen half cell (whose voltage, by convention, is zero), the potential observed is defined as the standard electrode potential, E o