The Nestlé Research Center hosted the 10th annual Nestlé International Nutrition Symposium on the topic of "Nutrition, Obesity and Society". Over the past decades, obesity has become a global epidemic affecting industrialized and emerging countries alike. Overweight and obesity are major risk factors for developing non-communicable diseases such as heart disease and stroke. Diabetes, osteoarthritis and even certain cancers are linked to obesity, and in low income societies this is often in addition to the burden of infectious disease and undernutrition. The symposium brought together renowned scientists, key opinion leaders and Nestlé experts for two days at the Nestlé Research Center, Lausanne, Switzerland, to discuss the science and health economics linked to the obesity epidemic.