Food systems interventions for nutrition: lessons from six program evaluations in Africa and South Asia

While there is growing global momentum behind food systems strategies to improve planetary and human health—including nutrition—there is limited evidence of what types of food systems interventions work. Evaluating these types of interventions is challenging due to their complex and dynamic nature and lack of fit with standard evaluation methods. In this paper, we draw on a portfolio of six evaluations of food systems interventions in Africa and South Asia that were intended to improve nutrition. We identify key methodological challenges and formulate recommendations to improve the quality of such studies. We highlight five challenges: a lack of evidence base to justify the intervention; the dynamic and multifaceted nature of the interventions; addressing attribution; collecting or accessing accurate and timely data; and defining and measuring appropriate outcomes. In addition to more specific guidance, we identify six cross-cutting recommendations, including a need to use multiple and diverse methods and flexible designs. We also note that these evaluation challenges present opportunities to develop new methods and highlight several specific needs in this space.