Back when I looked into fluoride in water, my take away was that for adults it has little impact on IQ, but may have more on younger people. Research was still

Back when I looked into fluoride in water, my take away was that for adults it has little impact on IQ, but may have more on younger people. Research was still ongoing. From my understanding, fluoride in water was more a thing done for poorer communities (or people with bad oral heath routines, aka not brushing your teeth), and the cheapest, most effective way to help these people is to put it in everyones water. But from personal standpoint, the best way to look after your teeth is to brush with fluoride toothpaste, twice a day (ideally w/ electric brush), and floss once a day. Fluoride mouthwash is also a good idea (but look up what a good mouthwash is, you don't want one with alcohol in it). Though using mouthwash isn't as important as brushing/flossing. Personally, I'd rather not have fluoride in water until we have more conclusive reliable research on it. But having said that, I understand why it's often put in in a cost–benefit view point.