3. Fruit
Fresh fruit can dramatically whiten teeth and remove stains. Apples, strawberries, pineapples, and other citrus fruit and their peels are effective natural whiteners as they contain a number of enzymes that can break down plaque and stains that make the teeth appear yellow. However, the fruits contain acids that can wear down the enamel, so drink plenty of water after eating them, and don’t brush your teeth immediately afterward.