Before your teeth whitening session, the focus is on protecting your teeth and gums from the possibility of post-treatment sensitivity. The night before and the morning of your session it is recommended that you brush your teeth very gently, avoiding your gum line as much as possible to prevent abrasions. Do not floss. No need to restrict food or drink.
After your teeth whitening session, it is recommended you avoid food and drink that would stain a white shirt for 24 hours. For the first few days after your whitening session, brush your teeth very gently with white toothpaste that does not contain whitening ingredients or baking soda.