The causes of Vitamin B12 Malabsorption might surprise you. If you've been told that you don't have intrinsic factor or that you have pernicious anemia, your doctor might be WRONG. Find out what might
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Vitamin B12: What Is It And What Does It Do?
New Vitamin B12 Test - Who should get tested for vitamin B12 (cobalamin) deficiency and which is the best test to use: serum B12, methylmalonic acid (MMA), or holotranscobalamin levels? - By Dr. Michael Greger