Vitamin B-12 is a water soluble vitamin which helps maintain healthy nerves cells and red blood cells. It functions as a methyl donor and works with folic acid in the synthesis of DNA and red blood cells and is vitally important in maintaining the health of the insulation sheath that surrounds nerve cells. Vitamin B-12 is also called Cobalamin as it contains the metal cobalt. During digestion hydrochloric acid in our stomach releases B-12 from proteins in foods. This vitamin B12 then combines with a substance called gastric intrinsic factor (IF). This complex can then be absorbed by the intestinal tract.

Deficiency:

Though Vitamin B-12 is water-soluble it does not get excreted quickly in the urine, but rather accumulates and gets stored in the liver, kidney and other body tissues. Thus its deficiency may not manifest itself until after 5 or 6 years of a diet supplying inadequate amounts. The most common vitamin B-12 deficiency disease is pernicious anemia characterized by large, immature red blood cells. You may suffer from underlying stomach or intestinal disorder that limits the absorption of vitamin B-12.It is seen that many patients exhibiting symptoms of Alzheimer's actually suffer from Vitamin B-12 deficiency. Deficiency of vitamin B12 has also been associated with. Common signs and symptoms associated with Vitamin B-12 deficiency include: