Why does asparagus make urine smell Are there any other Spear Grass might cause a unique scent inside your pee. It is commonly known that consuming this green vegetable can cause a pungent aroma while visiting the restroom. If you see an offensive aroma after enjoying a meal containing asparagus, do not be alarmed. It is just a natural result that occurs within the body. Be reassured that the odor poses no harm and will go away eventually.