vitamin b12 injection where to inject Best Sites: B12 · PA Relief What You Need to Know

Green R, Allen LH, Bjrke-Monsen AL, Brito A, Guant JL, Miller JW, et al Vitamin B12 deficiency Nat Rev Dis Primers

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In contrast, B12 injections go directly into the bloodstream

Many people go years without detecting their B12 deficiencies, which can have devastating health consequences

If you take more than what you need, your body passes the rest out through your pee

If you develop severe allergic reactions such as difficulty breathing, facial swelling, or widespread rash after a B12 injection, call 999 or go to A&E immediately, as these may indicate anaphylaxis, though this is extremely rare