>>3852045https://www.smithsonianmag.com/science-nature/from-gunpowder-to-teeth-whitener-the-science-behind-historic-uses-of-urine-442390/>Romans used urine to clean and whiten their teethNo wonder their empire collapsed. They all were gargling piss. As far as I know the only ones gargling piss nowadays are muslims (because the Quran talks about the healing properties of camel utime).