The document summarizes an integrated nutrition program in Bangladesh called Jibon o Jibika that targeted 200,000 children under age 2. It showed that reducing undernutrition was more effective when all program components, such as food production, marketing, health, water and sanitation, were implemented together. Stunting, wasting, and being underweight declined more in areas where all components worked together. Dietary diversity and income also increased more in integrated areas. The document discusses proven interventions to reduce undernutrition and calls for more evidence on how best to integrate different sector approaches, prioritize interventions, and strengthen programs targeting mothers and children under age 2.