Yep, loss of Iodine in modern diets can not be understated.  Have heard the bromide treatment before too.  But as I stated above, Calcium Fluoride isn't as toxic as the Sodium Fluoride they add to our water or make our toothpaste from. Calcium Fluoride toothpaste is available if you hunt around though. I've only ever had one cavity in my life, and that was in a part of my tooth that was never exposed to fluoride (below the gum-line impacted wisdom tooth issue). And I'm not the most mindful of teeth brushers either and I like sugar a bit too much. Fluoride does toughen and protect your teeth. But by all means, seek out a safer compound than Sodium Fluoride. It's basically a neuro-toxin.