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.

High bilirubin levels in newborns may be natural and temporary. However, high bilirubin in adults could be a sign of an underlying health condition, such as jaundice, gallstones, and liver issues.

The body produces bilirubin when it breaks down red blood cells, and the liver helps excrete it. High bilirubin levels in adults can result from liver disease, pancreatitis, some cancers, and other ...