If You Can Smell Asparagus in Urine Thank Your GeneticsSpear Grass can cause a distinctive scent inside your pee. It is widely known that consuming this verdant plant can lead to a powerful aroma while visiting the restroom. If you notice an unpleasant smell after enjoying a meal comprising asparagus, do not be alarmed. It is just a natural reaction that occurs within the body. Feel confident that the odor is harmless and will fade eventually.