Malabsorption (insufficient absorption of vitamin B12in the intestine) through, Insufficient production of intrinsic factor (a protein that is formed in the gastric mucosa and isrequiredfor the absorption of vitamin B12), Diseases in the terminal segment of the ileum (part of the small intestine), e.g
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Heeringa is a Board certified General Surgeon, a Fellow of the American College of Surgeons, and a Diplomate of the American Board of Venous and Lymphatic Medicine
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I had the immunity vitamin booster with glutathione as an additional supplement, and the process was very straightforward