Fluoride is something most people encounter every day in toothpaste, and in many communities, it’s also present in drinking water. But while it’s now a routine part of oral care, fluoride actually has a fascinating history that spans scientific discovery, public health innovation, and decades of research into cavity prevention.

Today, fluoride is widely recognized as one of the most effective tools for strengthening teeth and reducing tooth decay—but it wasn’t always so widely understood or accepted.

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Discover the history of fluoride in drinking water and toothpaste, and learn how this naturally occurring mineral became one of the most effective tools for preventing cavities.