Why the current Recommended Daily Allowance for vitamin B12 may be insufficient, and what the optimal dosage is.
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This is the second in a 5-video series on B12. Stay tuned for:
• Healthiest Food Sources of Vitamin B12 (
• The Optimal Vitamin B12 Dosage for Kids, Pregnancy, and Seniors (
• The Best Type of Vitamin B12: Cyanocobalamin or Methylcobalamin? (
If you missed the first video, check out The Symptoms of Vitamin B21 Deficiency (
You can find all of these videos in a digital download here ( along with two additional videos that will be coming out in a few months.
My new recommendations are updated on my Optimum Nutrition Recommendations ( page.
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Thanks for watching. I hope you’ll join in the evidence-based nutrition revolution!
-Michael Greger, MD FACLM
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