Child malnutrition in developing countries leads to over 10 million child deaths per year, with over half of those deaths related to malnutrition. Key deficiencies like vitamin A, zinc, iron and iodine are responsible for over 35% of child deaths globally. Malnutrition can have long-term effects on children's immune systems, cognitive development and physical health that last into adulthood, including increased risk of disease, lower brain function and bone weakness. Addressing malnutrition could significantly improve lives and is an important humanitarian and ethical issue.