The total number of children, adolescents and adults living with obesity has surpassed one billion, according to a global analysis published in The Lancet. These trends, together with the declining prevalence of people who are underweight since 1990, make obesity the most common form of malnutrition across the majority of countries worldwide. The study was conducted by the NCD Risk Factor Collaboration (NCD-RisC), a network of 1,500 researchers and practitioners around the world.