<chemical>

<biochemistry> Member of the water soluble B vitamin group, important in the proper function of the nervous system and important in proper carbohydrate, protein and fat metabolism.

A cobalt-containing coordination compound produced by intestinal micro-organisms and found also in soil and water. Higher plants do not concentrate vitamin B12 from the soil and so are a poor source of the substance as compared with animal tissues.

Pharmacological action: haematinics.

Chemical name: Vitamin B12

(12 Dec 1998)