Today, billions are malnourished: not eating a diet containing energy and nutrients in healthy amounts. Both lack of food and excess of consumption cause huge levels of disease worldwide. To a significant extent, the food systems in which people participate determine what people can and do eat (i.e. their diets); and as a consequence, their health.

Food systems are, therefore, central to solving many of the world’s biggest health challenges. But the way in which they affect health in different regions and among different groups of people is complex, and varies greatly. An understanding of these interconnections and their effects is needed, in order for food systems to be changed in ways that promote human wellbeing.