Dr. A is a New York Times bestselling author and the tenth physician in the world to be board-certified in critical care. When he saw that traditional medicine was failing to truly help patients change their lives, he left critical care to co-found OPTAVIA and to develop his groundbreaking system, Dr. As Habits of Health. Since then, he has helped hundreds of thousands of people change the trajectory of their lives and continues to lead a community of compassionate health advocates who believe that the Habits of Health can change the world.