Copper is a trace mineral and is widely distributed in foods so a deficiency is rare.
The RDA for copper for men and women aged 19 years and older is 900 micrograms a day. Good food sources of copper include organ meats, seafood, nuts, and seeds. Whole-grain foods are also good sources.
Deficiency symptoms include anemia, reduced levels of white blood cells, and osteoporosis in infants and growing children.