I used to buy imported NovaMin toothpaste too, but on my last batch I found that the choices had dwindled, and prices had vastly increased. With more research I found that there were now Hydroxyapatite toothpastes available both from import and in the US. Hydroxyapatite is the material of your dental enamel and manufactured Nano-hydroxyapatite seems to have essentially similar performance to NovaMin - at least in the studies I skimmed.
