It cannot make a complete colour change, but it may lighten the existing shade.
There are a number of reasons why you might get your teeth whitened.
Everyone is different; and just as our hair and skin colour vary, so do our teeth.
Very few people have brilliant-white teeth, and our teeth can also become more discoloured as we get older.
Your teeth can also be stained on the surface by food and drinks such as tea, coffee, red wine and blackcurrant. Smoking can also stain teeth.