Fluoride is naturally found in water. The level of fluoride in water can vary. If this level is too low, fluoride is added to drinking water, because it is very beneficial in preventing tooth decay and making teeth stronger.
There are different opinions on whether fluoride should be added to drinking water, but the American Dental Association unreservedly supports the fluoridation of community water, and says that fluoridation is effective and necessary in preventing tooth decay.
While it is important to get enough of fluorite, it is also important not to consume too much, because excessive fluoride intake can cause dental fluorosis and skeletal fluorosis.
The level of fluoride in fresh fruits and vegetables, and therefore in juices and smoothies, is very low. Some seafood may contain slightly higher level of this mineral.