quasi random (kaolinfire) wrote,
quasi random
kaolinfire

Why is urine yellow?

"Urochrome, the pigment that gives urine its characteristic color, is derived from urobilin, which in turn is mainly derived from bilirubin, produced from hemoglobin in red blood cells. Normal urine is yellow to amber in color, depending on the concentration of pigment." (from the ny times)

And here's a list of discoloration by pigment.

And this is a crazy bit of science fiction Well, not that crazy, and not that fiction. But still. :)

Actually, it's the *heme* of the hemoglobin that becomes bilirubin. The globins are protein and are recycled.

This is a beautiful scientific article on hemoglobin.


Are you afraid of Bilirubin???
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