Manganese

Manganese is stored in the bones, kidneys and pancreas and is classed as a trace mineral.
Manganese supports normal health. It is a cofactor that helps enzymes carry out their functions in the body.
Manganese is essential for the metabolization of cholesterol, carbohydrates, and protein. As a component of the antioxidant enzyme superoxide dismutase (SOD), it helps combat the damaging effects of free radicals by converting superoxide, a metabolic byproduct, into safer molecules that won’t cause cellular damage.

https://en.wikipedia.org/wiki/Manganese