The ceruloplasmin test measures the amount of ceruloplasmin, a copper-binding substance, in the body. It is often ordered for people with symptoms of copper deficiency, Wilson's disease, Menkes syndrome, and for early screening of Wilson's disease in people who do not have symptoms.

Ceruloplasmin (a copper-binding protein) testing is often ordered for people with copper deficiency, Wilson's disease, Menkes syndrome, and early screening for Wilson's disease in people without symptoms.