All natural teeth darken with time. It’s normal. It is much better to “maintain” the whiteness of your teeth rather than to let them darken and then touch-up the whiteness.
Waiting until your teeth darken and then touching them up is a losing proposition over time. Keeping your teeth at their maximum whiteness, not allowing them to ever darken is the only sure-fire way to have a lifetime of beautiful white teeth – FOREVER!
