self administered b12 injection How to Give a Injection: Step-By-Step Instructions B12 Shots at Home: NHS

B12s role in energy metabolism forms the basis of the question of whether it causes weight gain

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Accessed 12/3/20, Lexicomp

Most clinics add vitamin B12 (cyanocobalamin or methylcobalamin) to the blend and administer the whole thing as a single intramuscular or subcutaneous injection, which is why MIC injections and MIC B12 injections usually refer to the same product

If the needle inadvertently hits the sciatic nerve, the patient may experience partial or permanent paralysis of the leg

McMullin PR, Hynes AT, Arefin MA, Saeed M, Gandhavadi S, Arefin N, Eckmann MS