The document summarizes the findings of the Nutrition Causal Analysis (NCA) research project in Burkina Faso and Chad. The NCA is a structured, participatory study that aims to understand the local causes of undernutrition. The research found that factors like lack of education, long male absences, poor access to water, and weak economic security for women increased undernutrition rates. Additionally, active female involvement in education, income generation, and household financial management was linked to lower undernutrition. The NCA brought multi-sectoral insights but had limitations in measuring relative cause importance and fully integrating gender indicators. Future work will provide NCA guidelines, disseminate findings, and support more gender analyses using the methodology.