Ancient Romans used urine to clean and whiten their teeth
The ammonia in the urine removed stains, which is why Romans also used it to clean clothing. Urine was used in toothpastes and mouthwashes until the 1700's.
Curiosity.com
The ammonia in the urine removed stains, which is why Romans also used it to clean clothing. Urine was used in toothpastes and mouthwashes until the 1700's.
Curiosity.com
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