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start:life_sciences:human_body:asparagus_enigma

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Asparagus odor in urine

There are two as yet unexplained enigmas regarding the unusual odor of the urine of those who have recently eaten asparagus.

1) The odor-causing molecules have not been unequivocally identified.
2) Some individuals cannot smell the odor at all.

Reference: Excretion and Perception of a Characteristic Odor in Urine after Asparagus Ingestion: a Psychophysical and Genetic Study (Chem. Senses (2010) doi: 10.1093/chemse/bjq081 )

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