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