Institute for Integrative Nutrition. Read more about} the Institute for Integrative Nutrition, the world's largest online nutrition school. As a certified Health Coach, you will help change the lives of others by spreading the ripple effect. We're more than a school; we're a movement! The Institute for Integrative Nutrition is the world's largest nutrition school. Our Health Coach Training Program empowers students to launch a meaningful new occupation, transform their health, and change the world. Our community continues to grow with more than 60,000 students and graduates in 124 countries worldwide. Our mission is to play an important role in enhancing health and happiness, and through that process produce a ripple effect that transforms the world.