8 ms·

You're in for a big surprise: https://www.smithsonianmag.com/science-nature/from-gunpowder-to-teeth-whitener-the-science-behind-historic-uses-of-urine-442390/

• chaosjevil 3y ago
  It's a bit off-topic, but the role of urine in teeth cleaning reminds me one of Catullus' poems, poking fun at someone who was a bit too eager to laugh/smile as trying to show off how much urine he drunk. For context: Celtiberians used urine to brush their teeth. The Romans were aware of that, but they thought that it was disgusting. (The poem is Catullus 39, if anyone is interested. Link: https://en.wikisource.org/wiki/Translation:Catullus_39 https://en.wikisource.org/wiki/Translation:Catullus_39 )