Library · Cellular process
Bilirubin
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Bilirubin is a yellowish substance that appears when the body breaks down aging red blood cells. Picture the body clearing away cells that have reached the end of their life cycle: some of their components are turned into bilirubin, which becomes part of bile.
The liver removes most of this bilirubin through the bile ducts. If the liver is damaged or the flow of bile is blocked, that exit route fails and bilirubin can build up in the bloodstream.
In brief
Bilirubin is a yellowish substance the body produces as it normally breaks down red blood cells that have reached the end of their lifespan. Bilirubin is one of the substances found in bile.
The liver removes most bilirubin from the body through the bile ducts. If the liver is damaged or the ducts are blocked, bilirubin can enter the bloodstream.
Sources (1)
- MedlinePlus, U.S. National Library of MedicineBilirubin Blood TestPublished
This page explains the topic in general terms; it does not tell anyone what treatment to follow.
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