Liver
Total Bilirubin
LOINC 1975-2 · mg/dL
Ranges
Reference range: 0.1–1.2 mg/dL
What it is
Total bilirubin is the yellow pigment made when red blood cells break down. The liver processes it for removal in bile.
Why it matters
It helps assess the liver and the breakdown of red cells; high levels cause the yellowing of jaundice.
What high values can mean
A higher value can reflect liver or bile-duct problems, faster red-cell breakdown, or benign Gilbert syndrome.
What low values can mean
A lower value is normal and not a concern.
How to improve it
Care targets the underlying liver, bile or blood cause; the value follows that.
Food & lifestyle
No specific food changes it; supporting liver health and hydration is sensible overall.
Preparing for the test
Part of a liver panel; fasting is sometimes requested — follow your lab.
When to talk to a doctor
Discuss a raised total bilirubin with a doctor, especially with yellowing of the skin or eyes.
Related markers
Sources
- MedlinePlus (NIH)
- Testing.com (AACC)
Content reviewed on June 26, 2026
Medical disclaimer
This content is for educational purposes only. It is not medical advice and does not diagnose, treat, or prevent any condition. Reference ranges vary between laboratories — always use the range printed on your report and discuss your results with a healthcare professional.
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