TIL ancient Romans used urine to brush their teeth, as a mouthwash to whiten their teeth and they even used it as a laundry detergent to wash their clothes off until 1700’s.

[–] • 3 pts

It's oddly apparently a teeth whitener.

They had lots of the same twisted beauty ideals.

[–] • 1 pt

I think the whitening effect is caused by the ammonia in the urine.

[–] • 1 pt

I concur. This sounds like a highly viable hypothesis.

[–] • 0 pt

But doesn't it have to sit around and rot a bit for microbes to shit ammonia?

[–] • 0 pt

I think so. I know they used stale urine to de-grease (lanolin) the fleece from sheep in olden days.