The Sensishield® technology within the formulation contains the active ingredient hydroxyapatite, the key natural building block of teeth.It recalcifies tooth surfaces to leave them smoother, brighter and less likely to stain and provides a protective enamel shield over tooth enamel so teeth are therefore more resistant to acidic food and drink.Developed by dental professionals and with a leading UK university, the advanced technology within UltraDEX works with your natural oral pH level and is clinically proven to:•Whiten teeth within 14 days by gently lifting organic stains to return teeth to their natural brightness•Eliminate odour-causing compounds (VSC) and deliver 12 hours fresh breath•Kill bacteria that can cause gum problems, tooth decay and plaqueAlcohol free and safe for daily use with a mild mint flavour. Contains Fluoride. How to Use Use 15ml twice daily, rinse around teeth and gums for 30 seconds. Especially beneficial if used last thing at night so it can work while you sleep. NB For maximum effect wait 30 minutes after use before rinsing, eating or drinking and use together with UltraDEX Recalcifying & Whitening Toothpaste. Hazards and Cautions Do not swallow. Not suitable for children 6 years and younger. Do not store in direct sunlight. Ingredients Aqua, Hydroxyapatite, Glycerin, PEG-60 Hydrogenated Castor Oil, Polysorbate 20, Sodium Monofluorophosphate, Aroma, Cellulose Gum, Sodium Saccharin, Trisodium Phosphate, Sodium Chlorite, Menthone Glycerin Acetal, Sodium Benzoate, Sodium Citrate, Citric Acid, Gellan Gum, Sodium Bicarbonate, Limonene, Linalool