I don’t know how many times I’ve heard this. The story goes that people used to brush their teeth with urine, supposedly due to the high ammonia content. The story goes so far as to include people actually selling their urine for the sole purpose of dental care. This point in particular makes me question the practice. I couldn’t find anything in the archives and only shoddy stuff on the 'net. What’s the Dope on this subject. Did people ever really brush their teeth with urine?
I think I’d just stick to using my finger.