Copper is crucial to the body for a healthy existence. The body does not produce copper, so you have to get your Recommended daily/dietary Allowance (RDA) from outside sources. Copper plays a key role in proper growth, thyroid gland function and cholesterol levels. Copper makes sure the heart rhythm stays normal and helps the body utilize iron. Copper also helps red blood cells form and ensures thyroid gland function. Copper can help lower bad cholesterol and increase good cholesterol. A copper deficiency can result in brittle bones, osteoporosis, anemia and dilated veins.