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B12 injections are typically administered directly into the muscle, known as intramuscular injection
How Your Body Absorbs B12 Though you get it from food, vitamin B12 (or cobalamin) originally comes from bacteria
It is important to distinguish between excessive supplementation and pathologically elevated B12 levels, which may indicate underlying haematological disorders, liver disease, or renal impairment rather than true overdose
It prevents progression of anemia and nerve damage by supplying B directly, even when intrinsic factor (the gastric protein needed for oral B12 absorption) is lacking
Have gastrointestinal conditions that impair nutrient absorption (e.g., IBS, celiac disease, or Crohns)
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