Not just the very young - my 5 year old son was consuming toothpaste at such a rate that we have had to cut off his formerly unfettered access to it.
No amount of telling him 'eating a tubeful every few days is probably unhealthy' had any effect - he just loves the stuff.
I've recently learned about alleged dangers to drinking fluoridated water. Amongst them is increased rate of cancer and lowering of IQ. Interestingly enough, wiki doesn't mention this at all, but searching for it brings up a decent amount of (what look like) reasonable results. I am really curious about this, and want to learn more about this. I was wondering if anyone on LW has already conducted a research literature investigation on this topic, or if you just have tips/advice on what to pay attention to when I read the literature.
Thanks!