What is vitamin B12 and why is it so important?  What does it do in the body and what are some of the signs and symptoms that you might be deficient in vitamin B12?  What can happen to your body if you let the deficiency go untreated?  What foods are highest in vitamin B12 and what types of diets put us at the most risk of deficiency?  All these questions and more will be answered during Lisa’s interview with Sally Pacholok who is an expert on vitamin B12 deficiency as well as the co-author of the book Could It Be B12?