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If your B12 deficiency is due to an autoimmune disease or something that's not related to diet, you may need to get injections every two or three months for the rest of your life

Why Rotation Matters (Lipohypertrophy and Beyond) The single most important habit in subcutaneous technique is site rotation deliberately moving the injection point each time so you never repeatedly hit the same tissue

Vitamin B12 injections are generally considered to be very effective and almost always totally risk-free

It is not approved for human or animal use and must not be administered outside controlled in-vitro research environments

It may also be prescribed for certain cobalt deficiencies, certain pancreatic diseases, or intestinal malabsorption conditions