Worldwide, nutrition-related diseases have become a major health concern. The most apparent consequence of unhealthy diets and lack of physical activity is excess body weight and resulting cardiovascular and metabolic sequelae. 1 Many of these unfavourable health outcomes have developmental origins and track into adulthood 2 with unacceptable human, social and economic costs. 1 Social inequalities create unequal pressures and opportunities, relating to a range of environmental, social and economic factors, 3 some of which impinge on diet, addictive behaviours, physical activity, sedentariness, media exposure