Manganese is a constituent of several enzymes involved in metabolism. It is also important in bone formation.
Sources.The best sources of manganese are whole grains and tea.
Vegetables and fruits also contain moderate amounts.
Requirements.The AI for adults is 2.3 mg for men and 1.8 mg forwomen.
Deficiency and Toxicity.Its deficiency has not been documented.Toxicity from excessive ingestion of manganese is unknown. However, people who have inhaled high concentrations of manganese dust have developed neurological problems.