vitamin b12 injection for a patient with anemia Injections: Benefits and Risks How B12 Shots Support Your

Injections are typically recommended when absorption is impaired or when the deficiency is moderate to severe

Sartini D, Morganti S, Guidi E, Rubini C, Zizzi A, Giuliante R, Pozzi V, Emanuelli M (2013a) Nicotinamide N -methyltransferase in non-small cell lung cancer: promising results for targeted anti-cancer therapy

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High-dose supplementationparticularly intramuscular injections that can deliver 1,000 micrograms or morecreates substantially elevated serum B12 levels compared to dietary intake, which may more readily trigger these bacterial changes, though comparative studies between different forms are limited