I think this is not among the most important things to be talking about.
https://www.hsph.harvard.edu/magazine/magazine_article/fluoridated-drinking-water/
https://nutritionsource.hsph.harvard.edu/fluoride/
https://duckduckgo.com/?t=ftsa&q=fluoride+site%3A.edu&ia=web
Brussels sprouts used to taste different: https://en.wikipedia.org/wiki/Brussels_sprout#Contemporary_Brussels_sprouts