Copper

Function

Aids in the formation of red blood cells, along with iron, and helps in keeping the blood vessels, nerves, immune system, and bones healthy.

Overconsumption

Copper is toxic in large amounts.

Deficiency

Dietary deficiency of copper is not very common in humans.

Sources

Oysters and other shellfish, whole grains, beans, nuts, potatoes, organ meats, dark leafy greens, dried fruit