Our blood carries a protein called ceruloplasmin, whose job is to create copper. The Copper test, also known as the Total copper serum test, is a test that is used to measure the amount of copper in the blood. Copper is essential for various processes in the body; it helps the body make melanin, bone, and more. There are several health issues that can hamper the normal levels of copper in our blood. In such case scenarios, you will either have too little copper or excess copper – copper deficiency and copper toxicity. Copper deficiency is especially prevalent in malnourished children or premature babies. The deficiency can also be due to genetic disorder. Deficiency as well as toxicity of copper can be harmful for the body and can cause several diseases. The test is required to check if you have symptoms that are associated with deficiency or toxicity of copper.