Manganese

Manganese is a trace element that acts as a cofactor for several enzymes, taking part in carbohydrate and lipid metabolism, in cartilage and bone formation, and in antioxidant defence through the enzyme manganese superoxide dismutase. Through these roles it supports joint health and proper skeletal development. The requirement is small but genuine, and manganese has an unusual feature: animal raw materials are often low in it, so it is one of the trace elements that formulation must deliberately supply. That gap is precisely why poorly balanced home-prepared diets risk falling short of manganese, since a meat-only ration may not provide enough. Deficiency can impair bone growth and reproduction, but it is rarely seen clinically in pets fed a complete food, and toxicity from excess is uncommon at normal dietary levels, giving manganese a comfortable safety margin. Sources include some whole cereals, legumes and added mineral supplements. In a complete food, manganese is usually supplied as a mineral salt such as manganous oxide or sulphate, or as an organic chelated form, the latter considered better absorbed, and its level is set in line with [zinc](/glossary/zinc), [copper](/glossary/copper) and [iron](/glossary/iron), since these trace minerals compete and must be balanced together. On a label it appears among the trace elements. See the [Petipedia glossary](/glossary).

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