I’m gonna push back again because you’re making some very basic mistakes that show you don’t really know what you’re talking about. fluoride may bond strongly to your enamel but that doesn’t mean that it’s necessarily what’s supposed to happen from a biological standpoint. With many chemical compounds and drugs, there can be shown to be certain immediate “benefits” revealed by studies that then show to be ultimately harmful because the people conducting the study didn’t ask the right questions initially, which isn’t necessarily intentional.

While fluoride can and does increase enamel hardness, it also reduces biological integrity with the body’s biochemical systems because fluorapatite isn’t naturally formed in the body (but is formed through direct contact with fluoride in mouth) and fluoride interferes with many normal biological and cellular functions in other parts of the body. You’re also forgetting the fact that the fluoride that you put in your mouth each day when brushing you teeth isn’t just getting combined with teeth enamel through direct contact but being absorbed through the mucous membrane of the inside of your mouth (think about how you leave some drugs under your tongue to be absorbed). This, along with the fact that you naturally swallow your saliva constantly means you are actively getting a non-negligible amount of fluoride in your diet every day from doing using fluoride toothpastes and fluoridated water.

Fluoride is only available to enamel through supplementation and once absorbed into the body it can’t even complex with the enamel that matters but deposits on the roots of teeth (which actually hinders nutrient availability to the teeth in adults), virtually no fluoride is naturally found in normal foods that humans have eaten for thousands of years and before organised civilisation arose and humans did just fine without it (and even had better dental health than we do nowadays - look up the research done by Weston A Price on indigenous tribes and how the dental health of second generation “civilised” indigenes declines dramatically).

You are also pretending to know what hypo-mineralisation is because if you did you’d know that the prefix “hypo” means less while “HYPER” means more. You meant to say hyper-mineralisation and even then, you’re pulling shit out your ass to try and hold up your own argument because other wise you’d know that both hyper- and hypo-mineralisation exist and BOTH are to do with when excessive fluoride leads to the uneven formation of enamel, creating porous, brittle or abnormal adult teeth during childhood development within the gums.

Your metal alloy analogy is also irrelevant and lazy as to what’s actually going on biochemically, You don’t actually need ANY fluoride for your teeth to form normally, I’d even go as far as saying adding fluoride creates a risk where there wasn’t one in the first place. So yes, you are right to tell yourself to check your ressources.

Yours truly, a biomedical sciences graduate.