can you have a reaction to b12 injections injection side effects : r/B12_Deficiency Possible allergic reaction to B12

Theyre easy to take, widely available, and dont require a healthcare professional to administer

the subcutaneous approach on this page is this sites framing, not the standard route

Vitamin B-Complex Injection can be given either intramuscularly (IM), usually into a large muscle like the upper outer buttock (gluteal muscle) or thigh, subcutaneously (SQ) or sometimes intravenously (IV) as a slow injection in a clinical setting

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