Why Asparagus Makes Your Urine Smell Smithsonian MagazineAsparagus Officinalis can cause a noticeable smell inside your pee. It is commonly known that ingesting this green vegetable can cause a strong aroma when you visit the lavatory. If you observe an unappealing odor after enjoying a meal comprising asparagus, don't panic. It is simply a natural reaction that occurs internally. Rest assured that the smell is harmless and will fade eventually.