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The presence of a component that imparts an abnormal colour to urine. The pigment may be endogenous (e.g. bilirubin diglucuronide, porphyrin, myoglobin, hemoglobin, blood, homogentisic acid) or exogenous (e.g. beet, cascare, senna, levodopa, riboflavin, methylene blue).


Subjects: Chemistry.

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