This PowerPoint is composed of five parts. The first part is World Obesity Prevention Day. This template first shows the current situation of the world's obese people. The second part is about the standard and harm of obesity. This part first introduces the standard of obesity, followed by the harm of obesity, including the harm to the heart, blood vessels, liver, pancreas and other organs. The third part is about the causes of obesity, which mainly includes genetic factors, hormone imbalance, chronic stress and sedentary lifestyle. The fourth part is how to prevent obesity scientifically, including improving metabolic rate, reasonable diet, stabilizing mood and keeping adequate sleep. The fifth part is to standardize weight loss.