Fluoride is a mineral that helps prevent tooth decay (dental caries) by fighting acid-producing bacteria that turn into plaque. Found in many foods and water, fluoride also strengthens and protects tooth enamel to keep teeth strong and healthy.

Several studies have shown community water fluoridation (adjusting the amount of fluoride in drinking water) helps prevent tooth decay by about 25% in children and adults.

This article discusses fluoride treatments, their benefits, and their possible side effects.

Dentist applying fluoride to woman's teeth

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