[throwaway2037]

What about "Sensodyne Pronamel"? There is usually someone in the comments raving about its effects.

[robinson7d]

I think usually they rave about Novamin, which, at least in Canada, isn’t in the Pronamel line IIRC but in other Sensodyne branded toothpastes.

_EDIT: “repair and protect”_

[opello]

This was a good comment thread on which brands or markets had what with regard to hydroxyapatite:

https://news.ycombinator.com/item?id=36564190

[mikaraento]

I can be that someone this time. The ”repair and protect” version has helped my low-level toothache.