There are many parts of Europe that do not add fluoride, often it differs within the same country so you can rule of culture differences: https://www.researchg

There are many parts of Europe that do not add fluoride, often it differs within the same country so you can rule of culture differences: https://www.researchgate.net/figure/Map-of-England-and-Wales-illustrating-the-boundaries-of-the-water-companies-with_fig1_259725961 https://www.researchgate.net/figure/Map-of-England-and-Wales...