We recommend avoiding several different foods and/or liquids that can alter results or stain teeth for 24-48 hours after procedure. Beverages/Drinks to avoid are: fruit juices that are acidic, tea, coffee, colas or fizzy drinks, energy drinks, red wine, stout or dark beer. Foods to avoid: carrots, orange fruits and vegetables, broccoli and green vegetables, chocolate, wheat bread, tomatoes, red sauces, beets, and butter/margarine. Some further advice for lasting results would be to avoid extremely hot or cold liquids, smoking, and to use smudge-proof lipstick when possible. Women who are pregnant or lactating, persons with dental conditions, exposed cavities, or allergic reactions to hydrogen peroxide are not eligible for this whitening procedure.