Who doesn't warm to a flashy grin of pearly whites?
It's nice to have a healthy-looking smile, but if your teeth are turning yellow it could be a sign that your oral hygiene isn't quite up to scratch.
But what actually causes this discolouring? Well the old adage 'we are what we eat' certainly applies in this case. Just as there are some foodstuffs that can whiten your teeth - basil leaves, baking soda or even fruit peel - there are others that do quite the opposite.
