When Calgary removed fluoride from its public water supply in 2011, the effects weren\u2019t abstract\u2014they showed up in children\u2019s mouths. In the years that followed, cases of severe tooth decay among kids rose noticeably, offering a real-world look at how important fluoride is in preventing cavities.\n\nThe Calgary experience has since become a key data point in public health discussions, highlighting how a simple, community-wide measure can have a measurable impact on dental health\u2014especially for children who may not have consistent access to dental care.