|  Minerals and trace elements - Manganese  Manganese is required for bone formation and for   energy metabolism. It is also a constituent of an antioxidant enzyme,   which helps prevent free radical-mediated damage to cells.
 Manganese deficiency is rarely seen. Manganese toxicity is not a problem because blood levels are carefully controlled. It   is present in plant foods such as vegetables, cereals and nuts. Tea is   also a rich source.  In the UK, 50% of manganese intake is derived from   cereals and cereal products. © British Nutrition Foundation |