The average human adult body contains 2 to 5 mg of Vitamin B12, of which about half is stored in the liver. Other than resulting from insufficient stomach acid for which acid-lowering drugs, or H. Pylori infection may be responsible, cobalt or Vitamin B12 deficiency can develop from malfunctioning or surgical removal of parts of the stomach or small intestines, from celiac disease, parasites, or other malabsorption disorders. Cobalt Deficiency is not a major problem though as long as one has adequate amounts of Vitamin B12... Full Text