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Description
A deficiency in B12 can slow down your metabolism, making it harder to shed pounds even when youre eating right and exercising

doi: 10.1517/14728222.9.4.875

By preventing nicotinamide methylation, the compound increases intracellular NAD+ availability, which in turn activates sirtuins and other NAD+-dependent enzymes critical for metabolic homeostasis

J Perinat Med
Research suggests the opposite
