The most important thing you can do to keep your smile white is to avoid consuming anything that could stain a white shirt for 48 hours. This includes:
- Red wine
- Tomato sauce
For the week following your whitening, use a straw (a reusable straw if possible) when drinking colored beverages. If you eat something with intense color, brush your teeth as soon as possible after you are finished eating.
All in all, the whitening process is very simple, and the results can be profound.