Just to expand on this point a book: In Germany you buy fluoridated salt (you can also buy non fluoridated salt, you have the choice, no idea why you would do that though). Children and people with dental problems also can get fluoridated toothpaste.
I think this fluoridation thing is a non-issue in Germany, never heard anyone talk about it at least . Also I think the salt solution is a lot more elegant than the tap water one in the US.
I've never researched this so it may be confirmation bias, but my experience living in Europe and the US is that Americans have better looking teeth.
My all-time favorite: https://www.youtube.com/watch?v=VpwcF3Malj8
To play devils advocate.. we will never prove if smoking truly cause cancer, unless we go back in time and look at the same person in the same circumstances only that he/she never smoked.
And in all seriousness, my grandmother smoked all her life, from age of 16 all the way till she died at 103 due to Alzheimer. Her lungs were as gold as it gets!
Likewise, most European countries do not fluoridate their water and the correlation doesn't seem to show any significant difference in dental health. The anti-fluoride people state these numbers, and then go and use the same bad logical to attribute fluoride to a host of ailments that are loosely correlated without any causation links.
Can fluoride in water lead to osteoporosis in older adults? Well we don't know, and these types of studies are very difficult to conduct because there are tons of variables. Many people drink from a combination of fluoridated and non-fluoridated water supplies and beverages throughout their lives. People move in and out of municipalities with different water treatment techniques. People have different intakes for calcium, iron, fibre, carbs throughout their entire lives. People have different genetics. When it comes to long term toxicity, it's really difficult to narrow down factors because you can't control for everything (ethically) and humans can live a long time.
It would make sense for at least some percentage of the population to have adverse reaction to Glyphosate. We all have slight genetic differences and reactions. Can it lead to specific cancers in humans consistently? Do we understand the mechanism by which it does this chemically? Can we replicate this in other animals where we control for other factors.
Just like the tobacco industry, I wouldn't put it past Monsanto to both bury and make up studies to suit their interests.