There is much truth to the age old proverb “An apple a day keeps the doctor away” because apples are a rich source of potassium, vitamin C, B and minerals like calcium, iron and zinc that helps in maintaining the immune system while the phytonutrients in apples helps in regulating blood sugar. In addition, the antioxidants help in reducing the chances of asthma and lung cancer. Apple juice also improves brain functions thereby lowering the risk of Alzheimer’s.