Cobalt's primary biological role is as the central atom in vitamin B12 (cobalamin). Unlike ruminant animals that rely on gut bacteria to synthesize B12 from dietary cobalt, cats obtain preformed B12 directly from animal tissues. This means cats need cobalt only as it naturally occurs within the B12 molecule, not as a separate dietary element requiring bacterial conversion.
Your cat does not need supplemental cobalt. The cobalt within vitamin B12 in meat-based foods is the only form your cat requires. Any diet providing adequate B12 inherently provides adequate cobalt.
Cobalt deficiency in cats would manifest as vitamin B12 deficiency (anemia, lethargy, neurological problems), since cobalt's sole recognized role is as part of the B12 molecule. Direct cobalt deficiency is not a standalone clinical entity in cats.
Inorganic cobalt salts in excess can cause vomiting, poor appetite, and polycythemia (overproduction of red blood cells). However, cobalt toxicity from dietary sources is extremely unlikely.
