[1] Manganese is a vital element of nutrition in very small quantities (adult male daily intake 2.3 milligrams).

Several enzymes activated by manganese contribute to the metabolism of carbohydrates, amino acids, and cholesterol.

[2] A deficiency of manganese causes skeletal deformation in animals and inhibits the production of collagen in wound healing.

[3] Manganese is found in leafy green vegetables, fruits, nuts, cinnamon, and whole grains.

Many common vitamin and mineral supplement products fail to include manganese in their compositions.