Maybe 4 years ago I swapped from Sensodyne to Arm and Hammer sensitive since I found it more effective at cleaning my teeth. Just this week I swapped from Arm and Hammer to another brand since my teeth no longer felt clean after a brushing – the difference was immediate.

I understand there’s tons of reasons I may have experienced that, but it got me wondering if bacteria can adapt to the toothpaste you use if you stick with the same kind for years?