Buy 2, get 1 free. Powered with Nano-Hydroxyapatite, an ingredient engineered to mirror the mineral that makes up 97% of your enamel. 6 actives. 1 serum. Helps maintain white teeth* *Through mechanical action with regular brushing. Tooth Armour elevates your oral care. Powered by NH-10, a concentrated blend of 6 actives including Nano-Hydroxyapatite, an ingredient engineered to mirror the mineral your enamel is mostly made of, together with Hydrated Silica, Xylitol, Hyaluronic Acid, Niacinamide (Vitamin B3) and Zinc Gluconate. Add Tooth Armour to your existing toothpaste or use it on its own. Either way, your routine just got a serious upgrade. Tooth Armour is a toothpaste serum, designed to be used as part of your daily brushing routine. Add to your regular toothpaste or use on its own. Brush for 2 minutes, then expel. Use as directed as part of your oral care routine. Any benefits associated with Tooth Armour are derived from continued daily use, together with a good oral care routine.