Why Can't Some People Smell Asparagus in Their Pee NBC NewsGarden Asparagus can cause a unique odor within your pee. It is commonly known that ingesting this verdant plant can lead to a strong aroma during a trip to the bathroom. If you observe an unappealing odor once you've indulged including asparagus, don't panic. It is merely a natural reaction that occurs physiologically. Be reassured that the smell is not dangerous and will diminish eventually.