An innovative gel that forms a layer over teeth and then recruits calcium and phosphate ions from saliva to build new enamel has the potential to change dental treatment. To date, we don't have any way to regenerate the tough outer layer of enamel on our teeth as it erodes with age.
It already happens with nano-hydroxyapatite pastes. In Europe you find them at the supermarket for 5 euro, in USA you need a prescription and it’s sold for $$$
Uh no. You can get nHA toothpaste in the USA without a prescription, not sure why you’d think that. It’s just not a popular item here so it’s not sold at brick and mortar stores for the most part, though some smaller stores have it. But I have no problem ordering the stuff online.
Edit: Target apparently carries one brand now