Glosmile Citrus fruits such as lemons and oranges are great to eat for two reasons. One, they are a natural source of Vitamin C and, two, they can help in your teeth whitening endeavors. Orange or lemon peels can help brighten your teeth if you rub the back of the peel against your teeth. For better results, add a little salt to the lemon or orange peel.You need to get regular dental cleanings if you want to have a beautiful white smile. Schedule appointments for cleanings twice per year. Set up your next appointment while you are there so you will not forget to do it. Have their office call to remind you too.