Dr. Duke Johnson has dedicated more than 20 years of his life to stopping the epidemic spread of chronic diseases around the world. He is an expert on the different medical traditions practiced globally and on the state of world health, with patients living in more than 30 different countries. His preventive health teaching regularly reaches more than 3 million people in 55 countries. Dr. Johnson is Medical Director of the 30,000-square-foot, $14 million Nutrilite Health Institute Center for Optimal Health in Southern California and is a highly requested lecturer, having spoken to more than 100,000 people in 30 different countries on five continents. He has significant media experience with articles in many well-respected magazines and many large international newspapers.