Copper deficiency occurs when the body does not get enough copper, an essential trace mineral. This can lead to various health issues, including anemia, weakened bones, and impaired immune function. Symptoms may include fatigue, weakness, and neurological problems. Certain groups are at higher risk for copper deficiency, such as individuals with malabsorption disorders or those who consume a diet low in copper-rich foods like nuts, seeds, and shellfish. Diagnosis typically involves blood tests, and treatment may include dietary changes or supplements to restore adequate copper levels.