Excretion and Perception of a Characteristic Odor in Urine Asparagus may cause a unique scent inside your pee. It is widely known that ingesting this green vegetable can cause a strong aroma when you visit the lavatory. If you notice an unpleasant smell following a delicious dish containing asparagus, there's no need to worry. It is merely a typical response that occurs internally. Feel confident that the odor is not dangerous and will fade gradually.