To peel off or not to peel off?

I don't peel off the apple because... One large apple with the peel supplies 116 calories, no fat and 5.4 grams of fiber. That same apple delivers 239 milligrams of potassium, a mineral that's essential to heart and muscle health, as well as 10.3 milligrams of vitamin C. You'll also get 120 international units of vitamin A and 4.9 micrograms of vitamin K when you eat a large apple with the skin.

An apple without the peel is still a healthy food, but you do lose out on some of the nutrients you would get if you ate the skin. A large apple without the skin contains 104 calories and 2.8 grams of fiber. That's a significant fiber loss compared to an apple with the skin, and eating plenty of fiber keeps your digestive system working right. That same apple without the skin contains 194 milligrams of potassium and 8.6 milligrams of vitamin C. There are 82 international units of vitamin A and 1.3 micrograms of vitamin K in an apple without skin.