liver · TBIL · T. Bili
Total Bilirubin
A yellow pigment from the normal breakdown of red blood cells, cleared by the liver. Mild elevations are often harmless (e.g. the common, benign Gilbert's syndrome), but higher levels can reflect liver or bile-duct issues.
This page is general wellness education, not medical advice. Your own lab’s reference range and your clinician’s interpretation always take precedence.
Typical reference range
| Group | General range |
|---|---|
| Adults | 0.1 – 1.2 mg/dL |
Units: mg/dL. Ranges vary by lab and assay — read yours against the range printed on your own report.
What high Total Bilirubin can mean
- Gilbert's syndrome (benign)
- Liver disease
- Bile-duct obstruction
- Hemolysis (red cell breakdown)
- Fasting
What low Total Bilirubin can mean
- Generally not clinically concerning