How to test for functional vitamin B12 deficiency - Dr Michael Greger

Many doctors mistakenly rely on serum B12 levels in the blood to test for vitamin B12 deficiency. Michael Greger, MD FACLM: Dr. Greger is a physician, New York Times bestselling author, ("How Not to Die", "The How Not to Die Cookbook" and "How Not to Diet") and internationally recognized speaker on nutrition, food safety, and public health issues. In 2017, Dr. Greger was honored with the ACLM Lifestyle Medicine Trailblazer Award and became a diplomat of the American Board of Lifestyle Medicine Subscribe to this channel! 00:00 Introduction 00:38 Vegetarian vs meat eaters risks 01:30 determine b12 deficiency #functionalmedicine #vitaminb12 #vitaminscience CC BY @NutritionFactsOrg Original Video:    • How to Test for Functional Vitamin B12 Def...