Total Bilirubin (Serum)

This test gives your healthcare provider important information about how your body is working. Finding problems early can help you and your care team make timely decisions about treatment, lifestyle changes, or additional testing that may protect your long-term health.

Bilirubin is a byproduct of hemoglobin breakdown. High levels can indicate problems like liver disease, gallbladder issues, or hemolysis (red blood cell destruction). Low levels may suggest liver dysfunction or other conditions affecting bilirubin metabolism.

Before the test, your provider will give you specific instructions, which may include fasting for a certain number of hours, avoiding certain foods or drinks, or temporarily pausing some medications. Tell your care team about all medicines, supplements, and allergies you have, and ask questions if anything is unclear.

No special preparation is needed. You may eat and drink normally before your blood draw. Tell your provider about any medications or supplements you take, as they could affect results.

During the test, a trained member of your care team will carry out the procedure in a comfortable setting. The exact steps depend on the type of test, but most take only a short time. You may be asked to sit or lie still, and the team will explain each step as it happens so you know what to expect.

A healthcare provider will collect a blood sample from a vein in your arm using a needle. You may feel slight discomfort, but it usually lasts only a few seconds. The blood is then sent to a lab for analysis.

Your results may fall within a normal range or show values that need a closer look. Normal results usually mean no signs of concern at this time, while abnormal results do not always indicate a serious problem. Your provider will review the results with you, explain what they mean, and discuss any follow-up steps if needed.

Results are typically reported in milligrams per deciliter (mg/dL). Higher than normal levels may signal jaundice, liver disease, or blockages in the bile ducts. Lower levels may indicate liver problems or other metabolic issues.