There's some evidence that the amount of fluoride in tap water and toothpaste is enough to push some people into hypothyrodism.
Could people becoming fatter be related to fluoridated water? I've collected theories about obesity, but I've never seen this one before.
I'll look for links if anyone's interested, but from memory-- hypothyroidism is tricky to diagnose, and fat people frequently have a hard time finding doctors who will do more than tell them to lose weight.
Even if fluoridated water causes hyothyroidism and this is bad for people (being fatter may have little or no effect, but lack of exercise is bad for people, and low thyroid lowers energy levels), I have no idea how to balance that against fewer cavities.
Home filters generally don't remove fluoride. Some brands of bottled water down't have fluoride.
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