do vitamin b12 injections have side effects Common & Rare of What Does a B12 Shot

Important limitations you should know For people with normal B12 levels, the evidence is far less compelling

Retrieved May 1, 2025, from Drugs.com database

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Adenosylcobalamin is needed as cofactor in methylmalonyl-CoA mutaseMUT enzyme

Rare side effects include mild soreness at injection site or temporary increased energy that may affect sleep if administered late in the day

A Vitamin B12 injection is an intramuscular or subcutaneous administration of cobalamin a water-soluble vitamin essential for neurological function, red blood cell synthesis, DNA replication, and energy metabolism