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An essential metal that works in the functioning of the nervous system, including the brain. It plays a role in the treatment of Alzheimer's and schizophrenia. It is also important for bone and connective tissue.


Manganese is one of the most important nutrients, although our understanding of its role is not complete. It is essential for mental health and for a healthy nervous system.

Deficiency Symptoms

Deficiencies are rare, but may result in fatigue, poor memory, nervous irritability and involvement in diabetes, heart disease and rheumatoid arthritis.

At a Glance...

Manganese is an essential trace element required for nervous activity and bone and cartilage formation.

Functions Dosage Toxicity Further Information What you need to eat
Manganese is required for the production of bone, cartilage, tendons and other connective tissue. It plays a role in protein and DNA synthesis. It acts as an antioxidant and helps release energy from food stuffs. It also plays a role in blood clotting.
RDA is between 2.5 and 5 mg, but an intake up to 10 mg is not harmful.
Toxicity is also rare, but may include lethargy, involuntary muscular movements and coma.
Manganese supplements may be used to repair sporting injuries to tendons and ligaments.
Sources include cereals, tea, green leafed vegetables, wholewheat bread, pulses and nuts.

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