← Blood tests
Indirect Bilirubin
Routine annualalso unconjugated bilirubin
What it isThe fraction of bilirubin that has not yet been conjugated by the liver. It travels bound to albumin from the spleen to the liver.
DoesAwaits liver processing; in circulation, acts as an antioxidant.
GoodA mid-range level signals normal red cell turnover and adequate liver uptake capacity.
BadElevated indirect bilirubin indicates accelerated red cell breakdown (hemolysis) or Gilbert's syndrome — a benign genetic variation that slightly slows conjugation.
- Standard
- 0.2–0.8 mg/dL.
- Optimal
- 0.4–0.8 mg/dL (higher is good within range)
- Modifiers
- Rises with fasting in Gilbert's syndrome carriers; rises in hemolytic conditions.
How to optimize
- Lifestyle
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- Diet
- Adequate calories.
- Supplements
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- Peptides
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- Drugs
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Reference ranges are general adult lab norms; optimal ranges are editorial picks from the longevity literature — not medical advice. Always interpret results with your physician.
within Liver & Detox