Our tabs are formulated without fluoride as many people prefer fluoride-free toothpaste. Instead, all of our products are formulated with Nano-hydroxyapatite (nHAp) which is a non-toxic alternative to fluoride. nHAp is a mineral that is known to restore and strengthen teeth all while reducing sensitivity. It has also been the gold standard for fighting against cavities in Japan since 2013. You can read the study on this star ingredient here.Fun Fact: nHAp was first developed by NASA in the 1970's for astronauts.