It is only produced by bacteria produced in animals, so vegans often turn to fortified yeast extract, which only collects the vitamin when grown in animal excrement.
The Schilling test can determine whether the symptoms of deficiency of this vitamin are caused by lack of intrinsic factor. The deficiency, if present, is called pernicious anemia and is traditionally treated via intramuscular injection. The vitamin contains a central cobalt atom surrounded by a corrin ring of nitrogens. It is only produced by bacteria produced in animals, so vegans often turn to fortified yeast extract, which only collects the vitamin when grown in animal excrement. For 10 points, identify this compound with scientific name cyanocobalamin, the last in the series of B vitamins.
The Schilling test can determine whether the symptoms of deficiency of this vitamin are caused by lack of intrinsic factor.
Vitamin {B12} [accept {cyanocobalamin} before mentioned]