Although cosmetic treatments for whitening teeth are becoming immensely popular nowadays, they can irreversible damage to the tooth enamel. Teeth yellowing is a natural process which is caused by eating. While some foods leave a temporary stain like purple stain from blueberries, others make the stain permanent like that from drinking coffee. Thankfully, there are plenty of natural ways to get perfectly white teeth. One such natural way is to eat foods like apple that form a protective film over your teeth and shielding against staining. Here are some amazing natural ways to get pearl white teeth without having to go for cosmetic treatments.