Ceruloplasmin

Ceruloplasmin is a protein made by the liver that carries copper in the blood and also helps the body manage iron. Testing this protein helps doctors evaluate how well your body is handling copper. Low levels can be a sign of a genetic condition called Wilson disease, where copper builds up in the body, or may indicate that you are not getting enough copper from your diet. High levels are often a normal response to inflammation, infection, or pregnancy and are usually not a cause for concern on their own. Your doctor will typically look at this result alongside other tests to get a complete picture of your copper and iron health.

When elevated: Elevated ceruloplasmin is most often a nonspecific finding reflecting an acute-phase response to inflammation, infection, tissue injury, or malignancy. Physiologically elevated levels are expected during pregnancy and with estrogen therapy. Markedly elevated levels may occasionally be seen in primary biliary cholangitis and other hepatic or rheumatologic conditions. When low: Low ceruloplasmin is a key diagnostic marker for Wilson disease, a hereditary disorder of copper overload due to impaired biliary copper excretion. It may also indicate copper deficiency from nutritional inadequacy, malabsorption, or excessive zinc intake. Additional causes include severe protein-losing conditions such as nephrotic syndrome, protein-losing enteropathy, and end-stage liver disease with impaired synthetic function.

Ceruloplasmin is not a primary performance or recovery marker for athletes. However, it may be relevant if you have suspected copper deficiency (rare in adequately nourished athletes, but possible with restrictive diets) or iron metabolism concerns, since ceruloplasmin facilitates iron transport—a critical mineral for oxygen delivery and endurance performance. It's mainly a diagnostic tool for genetic copper disorders rather than a routine fitness or training metric.