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Bad_DNA t1_j9qw2tc wrote

Most all of those pigments are either degraded or go out the other chute. Urine is the body's way of managing a variety of salts and soluble byproducts of protein catabolism. Urea in various concentrations is... yellow

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kovadomen t1_j9qyzvq wrote

The yellow color of urine is because of urobilin, the end product of bilirubin catabolism. One part of bilirubin is excreted by GI tract, where it gives the brown colour - stereobilin. The other part is excreted by the kidneys and the urogenital system, it gives the yellow colour - urobilin.

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Bad_DNA t1_j9r12w9 wrote

Pay attention kids -- this poster is right and I knew urea was colorless. Man, where did that brain fart come from.

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