Fluoride is a natural chemical compound that is effective at preventing tooth decay.[1] As such, it is commonly used as an ingredient in toothpaste, and is sometimes introduced into local water supplies.[1]

Piquant Toothpaste, a spicy brand of wizarding toothpaste, was noted to be fluoride free on its label.[2]


Notes and references

  1. 1.0 1.1 "Fluoride" on Wikipedia
  2. Harry Potter Wizard's CollectionLabel Collection book (see this image)