Sharon fruit is the most effective fruit in preventing heart attacks and reducing the risk of heart diseases. It contains twice as much fiber as that in apples. It is also rich in other elements such as calcium, iron and magnesium. Food and herb specialists believe it can clear the heart, lubricate lungs, relieve diarrhea, treat hypertension, senile asthma and cough with mucus. It is high in tannins, and when tannin is absorbed into tissues, it protects cells, it astringes tissues, and it suppresses the propagation of bacteria. They are known to protect the body from influenza by developing resistance against virus infection.