#15: Ancient Roman Urine-Based Oral Hygiene

The Romans were masters of innovation—even regarding unlikely resources like urine. Rich in ammonia, urine was a surprisingly effective tool for daily life. For oral hygiene, it doubled as a primitive mouthwash, helping to clean teeth and freshen breath (by their standards).

Beyond personal care, it was crucial in Roman laundries, acting as a natural bleaching agent to brighten fabrics. While it may seem shocking today, this unconventional practice highlights the Romans’ resourcefulness and ability to make the most of their surroundings.