can b12 injections make you lose weight shots for loss: Do they work, risks, benefits, and more Best B-12 Injections for Weight
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Donath MY, Stsch G, Yan XW, Piva B, Brunner HP, Glatz Y, et al

Notably, within the first two hours after infusion, no discernible increases in plasma or urine levels of NAD+ or its metabolites were seen, indicating quick and thorough tissue absorption and/or metabolism (at least for the first 2 hours) (1)

Rarely, some people may experience temporary increased energy that could affect sleep if injections are given late in the day
But leave the megadoses on the shelf unless a doctor advises them
