Dr. Oz investigates how a vitamin B12 deficiency can age you. Find out how to get more B12 into your diet to help you feel younger and healthier.
Originally Aired:
January 11, 2012
Additional Air Dates:
August 29, 2012
Dr. David Katz,
Kate Geagan,
Keri Gans, MS, CDN,
Dr. Neal Barnard