This document summarizes Mercy Corps' PM2A program in Guatemala from 2009-2015 that aimed to prevent malnutrition in children under 2. The program worked through existing health structures and coordinated with the Ministry of Health and other government agencies. It provided behavior change communication, health system strengthening, preventative food rations to over 50,000 families. Key successes included adopting the program's model by the Ministry of Health and research coordination. Challenges included financial limitations of health providers and high turnover of government personnel.