Sensodyne Pronamel Intensive Enamel Repair Toothpaste for Sensitive Teeth, to Reharden and Strengthen Enamel, Extra Fresh - 3.4 Ounces (Pack of 4)

I use this at bedtime Sensodyne Pronamel (non-whitening), but during the day I use Boka Nano-hydroxyapatite . The Boka actually whitens my teeth (haven't had to whiten in over a year) and also helps with sensitivity - though I think the Sensodyne may be better for that. I read several scientific studies on nano-hydroxyapatite because it is highly regarded in Europe. It's catching on in the U.S., so expect to see major manufacturers start producing it.