If You Can Smell Asparagus in Urine Thank Your GeneticsGarden Asparagus can cause a unique smell in your pee. It is generally acknowledged that consuming this green vegetable can result in a powerful fragrance while visiting the lavatory. If you observe an offensive aroma following a delicious dish comprising asparagus, don't panic. It is merely a normal response that occurs physiologically. Be reassured that the scent poses no harm and will diminish over time.