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Intramuscular: Into the muscle tissue
Colchicine, para-aminosalicylic acid and heavy alcohol intake for longer than 2 weeks may produce malabsorption of vitamin B 12
Metabolism: B12 is vital for the metabolism of fats, protein, and carbohydrates
You are an older adult: Stomach acid production tends to decline with age, which can make it harder to absorb B12 from food and raises the risk of deficiency
Vitamin B 12 deficiency can develop for the following reasons: Absence of intrinsic factor, also called pernicious anemia: Intrinsic factor is a protein secreted by cells of the stomach lining
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