Boka toothpaste does prevent cavities. Instead of using fluoride, Boka toothpaste contains a mineral called nano-hydroxyapatite (nHa). nHa has been proven to protect against cavities as well as against plaque build-up. In fact, research has shown that nHa is actually better than fluoride - which is used in more conventional toothpastes - due to creating a more sturdy coating on your teeth.