2. Apple
Apple is generally known as the king of fruits. It is the most popular fruit in USA and there is good reason for its popularity. Apple is the richest source of flavonoids, fiber and antioxidants. An antioxidant present in apple is known to promote the health of our nervous system. People suffering from Alzheimer’s disease should definitely consume apple juice daily as it increases the secretion of a neurotransmitter called acetylcholine which can improve the memory of the people suffering from this disease. Apple’s skin is particularly very rich in dietary fiber. That’s why one should never peel the skin off an apple before consumption. Apple is good for other common health conditions such as diabetes and hypertension too.