Most people don't realise there's more going on at the enamel surface than they know their toothpaste is addressing.𦷠Nano-hydroxyapatite is an ingredient known to support the remineralisation process at the enamel surface ā supporting the enamel over time.š Tooth Armour uses nano-hydroxyapatite it in it's formula with hydrated silica, hyaluronic acid, zinc gluconate, xylitol and niacinamide.šØ Six actives. Two minutes. Drop it into your routine. ā Shop Tooth Armour #hismileUS