Allergic reactions to vitamin B12 are rare, but real. The reason may sound strange, but it's true - an allergy to cobalt.

Vitamin B12 contains cobalt, hence its name, cobalamin. It is a vitamin your body uses to create red blood cells and DNA. It also helps develop your central nervous system. Your central nervous ...

The two forms also differ in structure—methylcobalamin ... All forms of B12 contain cobalt (cobalamin). Taking vitamin B12 ...

Intestinal absorption of radioactive cobalt was impaired in both treated and untreated patients with the disease. Vitamin B 12 was found therapeutically as effective as folic acid in the treatment ...

Vitamin B12, according to the National Institutes ... called the cobalmins that incorporate an ion of the element cobalt in their structure, according to Discover) that helps keep your body ...