Bilirubin (Urine)
- Sample Type
- Standard
- Fasting
- No
- Unit
- mg/dL
Under normal physiological conditions, bilirubin (specifically conjugated bilirubin) is not detectable in the urine. Bilirubin is a byproduct of hemoglobin breakdown. Only conjugated (water-soluble) bilirubin can pass through the glomerular basement membrane into the urine. Its presence in a urinalysis is an early and sensitive indicator of hepatobiliary disease, often appearing before the patient exhibits clinical jaundice. It indicates that bilirubin levels in the blood are elevated because the liver is unable to excrete it into the bile or the bile ducts are obstructed.
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Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
Exposure of the urine sample to light for an extended period can degrade bilirubin, leading to a false-negative result. High concentrations of Vitamin C (ascorbic acid) or nitrites in the urine can also interfere with the chemical strip reaction.
Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.
Clinical References
Source-of-truth databases and clinical guidelines for Bilirubin (Urine):
Official Sources
- Primary biliary cholangitis. Treatment options in 2025. A narrative review - PMCpmc.ncbi.nlm.nih.gov
- EASL Clinical Practice Guidelines on genetic cholestatic liver diseases - PubMedpubmed.ncbi.nlm.nih.gov
- ACOG Endorsed | ACOGacog.org
Research & Guidelines
- PubMed: Bilirubin (Urine) Clinical GuidelinesNCBI / PubMed
Related Indicators
Medically Reviewed by Dr. Binoy Babu, MBBS
Board Certified Doctor • 10+ Years Clinical Experience
Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.
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