Fluoride has been shown to prevent decay in teeth

The United States Department of Health and Human Services will alter allowed fluoride levels in drinking water.

Fluoride has been known to prevent tooth decay by upwards of 50 percent.

In many areas, fluoride content is very closely monitored in drinking water. Many sources of water contain fluoride naturally, and some cities add small amounts to increase the level.

By law, water should contain anywhere from 0.7 to 1.2 mg/l.

Although found in many toothpaste and mouthwash products, the best source of fluoride is said to be from tap water.

The process of fluoridation for young children has been known as very effective. Helping protect and develop teeth, fluoride makes developing teeth stronger. However, after teeth have fully developed, fluoride cannot effectively penetrate the enamel and does very little in terms of protection.

Currently, fluoride levels are not monitored federally, allowing municipalities to determine the exact amount they would like in water.