The Food and Drug Administration (FDA) has concluded that low fat diets high in fruits and vegetables containing fiber, including soluble fiber, may reduce the risk of heart disease. Citrus fruits are fat-free and cholesterol-free and citrus fruit like oranges and grapefruit are a good source of fiber making them a smart choice for promoting heart health. According to Dr. Andy Morris of HealthSouth Heart College in Birmingham, Alabama, each serving per day of fruits or vegetables, including citrus, cuts the risk of heart attack by 6 percent. Furthermore, The Archives of Internal Medicine reported that for every 10 grams per day increase in overall fiber consumed, there was a 14 percent reduction in the risk of heart attacks and 27 percent lower risk of coronary heart disease death. Simply eating one orange per day will increase one's daily fiber intake by 3 grams!