Fluoride
Many cities in the U.S. add fluoride to the municipal water supply to prevent tooth decay, and many toothpastes contain it as an additive; but this use is somewhat controversial. The mineral does have toxicity concerns and is associated with increased cancer risk.
Key uses of fluoride:
- Bonds with dental and bone calcium as calcium fluoride, which protects the teeth from decay and may strengthen the bones.
- Used as part of a dental hygiene program in vitamins and toothpaste, and as fluoride treatments.
- Used experimentally for improving osteoporosis.
Where you can find it: Sodium fluoride naturally occurs in seawater, and thus, in seafood. Typically, we consume most of our fluoride from fluoridated tap water and toothpaste.
How much to take: Most people probably consume about 1-2 mg of natural fluorides per day. With added fluoridated water and toothpaste, this level can be too much, so supplements aren't necessary.
Too little or too much: Toxicity is of great concern worldwide. (The U.S. is the only industrialized country still fluoridating its water.) Deficiency may not truly exist, although it appears the absence of fluoride may predispose you to tooth decay.
