Today on Health and Longevity, Dr. John Westerdahl's featured guests are Stephen Sinatra, M.D., Board Certified Cardiologist and Anti-Aging Specialist, and David Jenkins, M.D., Ph.D., D.Sc., Professor, Department of Nutritional Sciences at the University of Toronto, Canada. Dr. Stephen Sinatra discusses heart disease prevention and the use of coenzyme-Q10 as a supplement for preventing and treating heart disease. Dr. David Jenkins developed the concept of the Glycemic Index of foods. He discusses how the Glycemic Index can be used as a way to determine dietary carbohydrate and its impact on blood glucose. Dr. Jenkins also shares his thoughts about the optimal diet for health and wellness.