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  1. Cyanocobalamin (intramuscular route) - Mayo Clinic

  2. Vitamin B-12 - Mayo Clinic

  3. Optimal Vitamin B12 Dosage and Treating Deficiency

  4. Do Vitamin B12 Supplements Cause Acne? - NutritionFacts.org

  5. Vitamin B-12 injections for weight loss: Do they work? - Mayo Clinic

  6. Vitamin B-12 and depression: Are they related? - Mayo Clinic

  7. Vitamin deficiency anemia - Diagnosis & treatment - Mayo Clinic

  8. Acne and Vitamin B12 - NutritionFacts.org

  9. The Best Type of Vitamin B12: Cyanocobalamin or Methylcobalamin?

  10. Do Vitamin B12 Supplements Cause Acne and Lung Cancer?