According to the Centers for Disease Control and Prevention, almost half of Americans live with at least one chronic condition, and chronic diseases account for 70% of all deaths in the U.S., 1/3 of potential years of life lost before 65, and 3/4 of medical care costs. Although the role of important risk factors such tobacco, nutrition, and physical activity are well known, there are many unknown factors that contribute to risk and which prevent completely accurate individualized risk assessment across a range of diseases. Nevertheless, it is possible that a traditional, 'low tech' approach...