What is Bilirubin? Bilirubin is a pigment found in bile, a fluid produced by the liver. It is created as a byproduct when hemoglobin from old red blood cells is broken down. The liver processes bilirubin and excretes it through bile ducts into the intestines. When the body cannot properly remove bilirubin, it accumulates in the blood, leading to high bilirubin levels. A bilirubin test checks liver health by measuring the levels of bilirubin in the blood. Bilirubin is a substance produced by the breakdown of red blood cells. Bilirubin (bil-ih-ROO-bin) passes through the liver and is eventually excreted out of the body. Higher than usual levels of bilirubin may mean different types of liver or bile duct problems. Bilirubin is a yellow pigment in bile that comes from broken-down red blood cells. A bilirubin test checks your bilirubin levels in your blood and can indicate liver or bile problems. What is an alarming bilirubin level? In adults, bilirubin levels above 1.2 mg/dL are usually considered high and warrant further investigation. For newborns, acceptable bilirubin levels can reach 12 mg/dL before triggering any serious concern.
