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Unlike oral B12 supplements, which must first pass through the digestive system, B12 injections are absorbed directly into the bloodstream, providing a quicker, more efficient boost

B12 Shot Side Effects Vitamin B12 shots, which are usually given as hydroxocobalamin or cyanocobalamin, are generally safe if youre deficient

It's about supporting your body's natural functions, not forcing an unnatural change

If you experience any of these symptoms, call 9-1-1 or go to the nearest emergency department