This document summarizes a systematic review of 117 peer-reviewed articles on social and behavior change communication (SBCC) approaches to improving maternal, infant, and young child nutrition practices. The review found that: - Interpersonal communication approaches, like home visits and peer counseling, were the most commonly used and consistently reported some of the greatest positive changes in nutrition practices. - Over half of the interventions targeted only one audience, such as pregnant/lactating women or caregivers. - A variety of SBCC approaches have been found effective depending on context, including timing, frequency, intensity, duration and quality of the intervention. - Further research is still needed to evaluate the relative effectiveness, complementarity and costs of