Many people are unaware that acidic food and drinks – like some fruit and juices and wine can temporarily soften the enamel on the tooth's surface. The more your teeth are exposed to acid, the more wear might occur. Over time this will alter their appearance, through changes in texture, shine and increased translucency. Left unmanaged you could be left with further loss of tooth enamel – exposing dentine, which as it is yellow in colour, causes to teeth to appear yellow and discoloured. Once tooth enamel is lost, it can't be replaced which is why when tooth enamel is worn by acid, no amount of whitening can take this yellow away. Only your dentist can diagnose acid wear however some of the typical signs include a smooth silky glazed appearance and a change in colour of your teeth - discolouration. New Pronamel Gentle Whitening has been specifically formulated to protect teeth from the effects of acid wear by re-hardening acid softened enamel. In addition, it has been specifically developed to gently yet effectively remove stains to restore teeth to their natural whiteness.Pronamel Gentle Whitening provides all the benefits of a regular toothpaste, protects against tooth decay and can therefore be used as your daily toothpaste. Brush your teeth gently, but thoroughly in a circular motion, twice a day with PRONAMEL GENTLE WHITENING toothpaste and toothbrush.