Manganese is a mineral which is important for the activation of various enzymes in the body, that are involved in energy metabolism. It is also necessary for the development of bone tissue. Manganese is an antioxidant: it protects the cells in the body from free radicals. Free radicals play a role in aging processes.


Manganese is found in cereals, rice and nuts. Other sources are (leafy) vegetables, fruits, meat, fish and tea. Pineapple is high in manganese.



Nothing is known about the possible effects in humans of insufficient manganese in the diet. In laboratory animals, defects in the brains and skeleton have been determined.


Excess manganese causes damage to the nervous system. Excess intake of manganese via the diet, however, is rare.