Watch this before quitting fluoride ๐จ Nano-hydroxyapatite is an ingredient known to support the remineralisation process at the enamel surface โ supporting the enamel over time.๐ Tooth Armour uses nano-hydroxyapatite it in it's formula with hydrated silica, hyaluronic acid, zinc gluconate, xylitol and niacinamide.๐จ Six actives. Two minutes. Drop it into your routine. โ Shop Tooth Armour