Davids | Sensitive+Whitening nano-Hydroxyapatite Toothpaste nano-hydroxyapatite (n-HA) to repair sensitive teeth + remineralise enamel natural whitening / antiplaque / fresh breath high performance safe + clean ingredients fluoride free sls free recyclable metal tube 98% usa origin ingredients premium natural peppermint oil flavoring Made in USA TOOTH NUMBING DRUGS A lot of Australians suffer from sensitive teeth and this is a big problem. To combat this issue, most sensitive toothpaste uses drugs (potassium nitrate) to temporarily numb the nerves of the teeth, but when the drug wears off, the tooth pain returns. Also, every time you brush your teeth with sensitive toothpaste with potassium nitrate, this nerve numbing drug is absorbed through the gums and enters the bloodstream...not ideal for health-conscious consumers. Instead of using drugs in Davids' toothpaste to numb the nerves, Davids uses hydroxyapatite to repair the tooth and block the passageways to the nerves. HYDROXYAPATITE nano-hydroxyapatite (n-Ha for short), was developed by NASA to repair and regenerate bone and enamel that astronauts were losing while in a zero-gravity environment in space. Davids has now incorporated this same cutting edge ingredient in their Sensitive+Whitening Hydroxyapatite Toothpaste to create a revolutionary advancement for those who suffer from sensitive teeth. The breakthrough proprietary formula of Davids Sensitive+Whitening toothpaste works to repair the tooth as hydroxyapatite is deposited inside the passageways to the nerves (tubules), where the bio-active material bonds to the inner tooth surface to plug the tubules and stop sensitivity at its source. BEFORE & AFTER INGREDIENTS calcium carbonate (limestone abrasive), vegetable glycerin, purified water, sodium bicarbonate (baking soda), xylitol (birch derived), hydrated silica, hydroxyapatite, sodium cocoyl glutamate, carrageenan (seaweed derived), mentha piperita (peppermint oil), mentha viridis (spearmint) leaf oil, pimpinella anisum (anise) seed extract, gaultheria procumbens (wintergreen) leaf oil, stevia (leaf extract).