Non-communicable chronic diseases (NCDs), such as cardiovascular disease, cancer, obesity and type 2 diabetes, are clearly the leading public health problems facing the world in the 21st century. The causes of NCDs are predominately unhealthful lifestyles such as physical inactivity, poor diets, smoking, unhealthful sleep habits and not managing stress effectively.1 In recent years, obesity rates have increased in most countries, and this problem receives enormous attention, in both the popular media and scientific press.