Molybdenum

What does molybdenum do?

Molybdenum is an essential trace mineral. It is needed for the proper function of certain enzyme-dependent processes, including the metabolism of iron. Preliminary evidence indicates that molybdenum, through its involvement in detoxifying sulfites, might reduce the risk of sulfite-reactive asthma attacks. However, a nutritionally oriented physician should be involved in the evaluation and treatment of sulfite sensitivity.

Where is molybdenum found?

The amount of molybdenum in plant foods varies significantly and is dependent upon the mineral content of the soil. The best sources of this mineral are beans, legumes, dark green leafy vegetables, and grains. Hard tap water can also supply molybdenum to the diet.

Who is likely to be deficient?

Although molybdenum is an essential mineral, no deficiencies have been reported in humans.

How much molybdenum is usually taken?

No recommended dietary allowance (RDA) has been established for molybdenum. The estimated range recommended by the Food and Nutrition Board as safe and adequate is 75–250 mcg per day for adults.

Are there any side effects or interactions?

Molybdenum is considered safe through a wide range of intakes (up to 15 mg per day), but it can interfere with the absorption of copper. Molybdenum is needed to convert purine to uric acid, and excessive intake could, in rare cases, cause gout-like symptoms, such as joint pain and swelling.