We have heard the saying a million times, "An apple a day, keeps the doctor away", and there may be something to it. Experts say studies have shown that eating at least one apple every day can help fend off throat, mouth, and colon and lung cancer. It is because they contain a nutrient called quercitin, which protects the cell's DNA from the damage that can lead to cancer.
That does not mean you should have an extra piece of apple pie though. The fruit loses its effect when it's peeled and combined with sugar and fat. So stick to whole apples, especially the skin.