One cup of fresh apples contains 4.37 grams of fiber, which is equal to 17 percent of the recommended daily value. The dietary fiber found in apples is made up of soluble and insoluble fiber that interacts with other phytonutrients found in apples.
Apples are high in vitamin C, which is an antioxidant that plays an important role in maintaining a healthy cardiovascular system. There are polyphenols in apples that increase insulin production and improve the body's ability to maintain proper blood sugar levels. The antioxidant and anti-inflammatory properties of apples have been shown to reduce the risk of developing both breast and colon cancer.