Across the globe, more people are suffering from obesity than at any other time in our history. Why has obesity become so common and so challenging? In this course, we will look at the root cause of obesity, as explained by the latest science. We will see how our food environment has evolved over the last half-century, and how it is altering our biology to over-consume calories and resist sustained weight loss. We will also see how stress, a sedentary lifestyle, and inadequate sleep disrupt our appetite control system to promote gaining weight. By developing a better understanding of the physiology behind obesity, you will learn how to work with your body to prevent and manage weight gain. This course will also provide practical tools and strategies for creating a long-term, sustainable weight management plan to leverage your habits and your surroundings.