why can’t teeth go back to their natural white by washing them daily?
In: Biology
1. The white that you’re probably expecting isn’t natural.
2. Fluoride in toothpaste and drinking water counterintuitively stains teeth brown even though it’s essential to prevent tooth decay. The person who discovered fluoride’s dental benefits observed a community whose drinking water contained deposits of fluoride and while they all had ugly, brown teeth, their teeth were much healthier with fewer cavities.
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