Genetics of Asparagus Smell in Urine NewsMedicalnetGarden Asparagus can cause a unique scent within your urine. It is commonly known that eating this verdant plant can lead to a strong aroma when you visit the lavatory. If you notice an offensive smell once you've indulged comprising asparagus, there's no need to worry. It is merely a normal response that occurs physiologically. Feel confident that the smell is harmless and will fade over time.