The Copper (24-hour urine) test measures the amount of copper excreted in urine over a 24-hour period, aiding in the diagnosis of copper metabolism disorders such as Wilson's disease or chronic liver disease. A 24-hour urine sample is collected, and high levels may indicate issues with copper elimination or absorption. This test helps assess copper balance in the body and monitor conditions related to copper toxicity or deficiency. Proper sample collection over the full 24-hour period is essential for accurate results.