Reduce blood pressure(3)Among other vitamins and minerals, pineapples contain a great deal of potassium. Potassium is a strong natural vasodilator, meaning it eases the tension of the blood vessels and promotes proper blood circulation to various parts of the body.As your blood vessels relax, your blood pressure reduces and the flow of blood is less restricted. So, pineapples can help prevent such conditions as stroke and atherosclerosis.