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An intradermal test dose is recommended before Cyanocobalamin Injection, USP is administered to patients suspected of being sensitive to this drug

Thats because utilization of vitamin B12 (especially from supplements) depends on levels of other metabolic cofactors and acids

"Deficiencies can occur if livestock don't consume enough selenium from pasture or rations, or if it is not available in a form that the animal can absorb and metabolise," Ms Krilich said

The combination may produce better results than either alone

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For those with moderate to severe deficiency, this is especially critical