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Learn about cobalt: its role in vitamin B12, deficiency symptoms, and health risks associated with excessive exposure.
Cobalt is an essential trace element required in small amounts by the human body.
Cobalt is a component of vitamin B12 (cobalamin), which plays a vital role in blood formation, DNA synthesis, and the function of the nervous system. Dietary sources of cobalt include meat, fish, dairy products, and eggs.
A deficiency in cobalt manifests indirectly as vitamin B12 deficiency, leading to anemia, fatigue, neurological disorders, and impaired concentration. Since the body needs only trace amounts, true cobalt deficiency is rare and usually associated with malnutrition or malabsorption disorders.
Excess cobalt intake, however, can be harmful. Chronic overexposure, for example through occupational exposure in the metal industry or poorly coated cobalt prostheses, has been linked to cardiac issues, thyroid dysfunction, and lung disease. Therefore, health authorities closely monitor cobalt exposure.
Key Facts about Cobalt