Published alongside the UN Secretary General’s second Global Strategy for Women’s, Children’s and Adolescents’ Health, this policy brief makes the case for strengthened focus on nutrition, with special attention to the first 1,000 days (from a woman’s pregnancy to the child’s second birthday), pregnant and lactating women, women of reproductive age, and adolescent girls. According to the authors, urgent action is needed to tackle malnutrition in all its forms and to help nutrition unlock the potential of investment in the health of women, children and adolescents.