The Smell of Asparagus Urine Part 1 ChemistryViewsAsparagus can cause a noticeable odor in your urine. It is widely known that ingesting this verdant plant can cause a pungent fragrance while visiting the lavatory. If you see an unpleasant odor following a delicious dish containing asparagus, there's no need to worry. It is merely a natural response that occurs within the body. Rest assured that the smell is harmless and will go away over time.