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All existing evidence is from cell cultures and rodents, and the compound is classified as research-use-only
The absorption of B12 depends on a protein produced in the stomach which decreased with age, therefore even meat eaters can be deficient in this vitamin
It works by blocking an enzyme called NNMT (nicotinamide N-methyltransferase)
The injections are usually administered in areas with higher concentrations of fatty tissue, such as the arm, abdomen, thigh, or buttocks
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