Physical growth and brain development takes place most rapidly during childhood, particularly during the first two years of life. It is essential from birth that children are provided a diet which fully meets their nutritional requirements. Good nutrition must be accompanied by interventions to prevent illness, such as essential immunization. To maximise health and development in this group, nutrition must be integrated within policy and programmes targeting young children. This policy brief forms a part of a series developed by RESULTS UK to document best practice in integrating nutrition within policy, programmes and investments for Reproductive, Maternal, Newborn, Child, and Adolescent Health (RMNCAH). This brief focuses on the early years of infancy and young childhood, taking Malawi as a case study.