Not sure what to think about this, but often (as in the linked discussion) it always starts out with the very fair "everyone should get to choose, you can use supplements", and then they start banning supplements:
What they need to do is gather statistics on dental health. It could take a decade or two, and ideally they've been recording the statistics for a good decade beforehand, for comparison.
But I doubt those making the rules care much for actual data, and only care about the result that makes them feel better about themselves.
This already happened long ago. It was proven to be a net win. It's just that red scared generals and brain worm officials are concerned about their precious bodily fluids, which is why they take their kids to play in polluted creeks.
Curious where they draw the line - are chlorine treatments to disinfect water okay? Both have a clear public health benefit with comparatively minimal downsides.
https://www.cnn.com/2025/05/13/health/fluoride-supplement-ba...
Which makes me just feel like these debates are always hard to have anymore because you never know what debate you're having.