https://supermouth.com/product....s/supermouth-hydroxa
Hydroxyapatite is a mineral that makes up 97% of our tooth enamel and 70% of dentin—the inner hard tissue. Unlike other synthetic fluoride alternatives, hydroxyapatite works by mimicking the natural composition of our teeth. This similarity allows it to integrate seamlessly, offering a more organic approach to repairing and strengthening enamel. For those wary of fluoride and its potential side effects, hydroxyapatite presents a promising option.