Bilirubin is a yellow pigment that’s in everyone’s blood and stool. A bilirubin blood test determines the levels of bilirubin in the body. Sometimes the liver can’t process the bilirubin in the body.

What Is a Bilirubin Test? A bilirubin test measures the amount of bilirubin in your blood. It's used to help find the cause of health conditions like jaundice, anemia, and liver disease. High levels ...