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  1. Vitamin B12 Dosage: How Much Should You Take per Day? - Healthline

  2. Vitamin B-12 - Mayo Clinic

  3. How Much Vitamin B12 Is Too Much? - Healthline

  4. How much vitamin B12 should I take daily? - Everlywell

  5. Vitamin B12 - Health Professional Fact Sheet

  6. Ask the Doctors - Are large doses of B12 safe? - UCLA Health

  7. Cyanocobalamin Dosage Guide + Max Dose, Adjustments - Drugs.com

  8. Vitamin B12 - Consumer - Office of Dietary Supplements - Vitamin B12

  9. Vitamin B-12: How much is too much? - Medical News Today

  10. Vitamin B12 Dosages: Your GoodRx Guide - GoodRx