We used standard methodological procedures expected by Cochrane. Our primary outcomes were serum vitamin B 12 levels, clinical signs and symptoms of vitamin B 12 deficiency, and adverse events.

One important nutrient that is essential to our general health is vitamin B. But it's possible that a lot of people aren't ...

† Division of Diabetes, Endocrinology and Metabolism, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee 37232, United States ‡ Program in Neuroscience, Vanderbilt ...