Idk what is in this stuff but it has to be magic! I have two cats and two dogs, after we moved into our new house our pets started peeing in my daughters nursery. It smelled awful! But after using the spray the stains were completely gone and so was the smell. I ordered a few bottles of this stuff and I intended to keep buying for any future issues. Also worked on our sofa when my daughter made a mess on it. Word of advice though, dont use on darker colors because it can leave a "bleached" stain.