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There was a history of intramuscular injection of Vitamin B-12 (cyanocobalamin) 8 days back over the gluteal region following which the patient experienced prompt pain, tenderness, and swelling over the injected area
Kawaguchi T et al
So the practical takeaway is not oral is better or SC is better. It is: pick one route, follow the documented per-dose figure for the vial you have, and keep the route constant so that whatever you observe is not confounded by a mid-stream route change
May I ask how you know your deficiency was alcohol related and not autoimmune
B12 injections are often preferred, especially in cases of malabsorption (where your body struggles to absorb B12 from food or tablets), as they deliver the vitamin directly into your bloodstream, bypassing any gut issues
My energy level has significantly improved
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