End product of hemoglobin breakdown is?

The end product of hemoglobin breakdown is bilirubin. Hemoglobin is a protein found in red blood cells that carries oxygen. When red blood cells die, they are broken down and the hemoglobin is released. The hemoglobin is then broken down further into several components, including bilirubin. Bilirubin is transported to the liver, where it is excreted as waste.