Copper is essential for red blood cell production and keeping nervous and immune system healthy. It also helps body produce collagen and aids iron absorption, making it a good choice for people with anemia. Copper is good for skin health and slows down skin aging. Enough intake of copper can also prevent bone diseases such as osteoporosis. Another issue that copper can help with is inflammation of the prostate. Good sources of copper are nuts, cocoa, seafood, organ meats, seeds and legumes.