Why is fluoride commonly added to drinking water?

Fluoride is commonly added to drinking water primarily to prevent tooth decay. Numerous studies have shown that fluoride helps to strengthen tooth enamel, making it more resistant to the acid produced by bacteria in the mouth. This process, known as remineralization, helps reverse early signs of tooth decay and reduces the incidence of cavities, particularly in children whose teeth are still developing.

The addition of fluoride to public drinking water systems has been endorsed by various health organizations, such as the Centers for Disease Control and Prevention (CDC) and the World Health Organization (WHO), as an effective public health measure for improving dental health across communities. This practice has been found to significantly lower the rates of dental caries in populations that have consistent access to fluoridated water.

In contrast, the other options do not accurately represent the primary reason fluoride is added to drinking water. While it does not enhance taste, prevent corrosion, or specifically reduce bacteria, its role in oral health remains a key factor in its addition to water systems.