The Global Obesity Prevention Center headquartered at Johns Hopkins Bloomberg School of Public Health and including experts from across Johns Hopkins University ranging from the School of Medicine to the Whiting School of Engineering, is the first center in the world dedicated to bringing a systems approach to obesity prevention and control. This means understanding that obesity is not a single cause and effect problem but rather is caused by a complex system of biological, behavioral, social, cultural, environmental, economic and other factors. So, in caring for obesity, telling a person to just eat less and exercise more is not enough. You have to understand and address the whole person and everything around him or her. For example, what about the person's biology may make weight loss more difficult? How are the person's social circles or environment preventing or inhibiting treatment? What combination of interventions may be necessary? Addressing obesity is complex, and the proper training and expertise is needed.