The Obesity Prevention Source is an in-depth resource for all who seek to understand the causes of obesity – and to reverse the epidemic of obesity in children and adults. Policy and environmental changes are the foundation of obesity prevention. The site aims to inform and empower people with science-based information about what can and must be done to prevent adult and childhood obesity; to help those who are overweight achieve a healthier weight; and ultimately, to turn back the obesity epidemic’s global spread.