How does Manganese work?

Manganese is an essential nutrient involved in many chemical processes in the body, including metabolism of cholesterol, carbohydrates, and protein. It might also be involved in bone formation.

Are there safety concerns?

Manganese is safe for most adults in amounts up to 11 mg per day. More than 11 mg per day might not be safe. Excess manganese can cause serious side effects, including symptoms resembling Parkinson's disease such as tremors. People who have trouble getting rid of manganese from the body, such as people with liver disease, may get side effects when taking less than 11 mg per day.

Check supplement labels carefully for "hidden" manganese. Some supplements (e.g., Cosamin and Cosamin DS) provide more than 11 mg per day when used according to the directions on the label.

The amount of manganese which is safe for children depends on their age. Discuss the appropriate amount with your healthcare professional before giving manganese to children.

Do not take manganese if:
  • You have liver problems, without the help of a healthcare professional.
Manganese can build up in people with liver problems and cause tremors, mental problems such as psychosis, and other side effects.

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