An apple a day does keep the doctor away but do you peel the apples just because you don t like the way the skin tastes? Apples are a rich source of vitamin C vitamin E and fibre. They help in preventing heart diseases treat diarrhea and constipation and more. However if you just eat the apple core and throw away the apple skin you are missing on most of its nutrition. A study published in the Journal of Agriculture and Food Chemistry says that apple skin could be as responsible as the core for an apple s anti-cancer benefits.