Salk Institute Sep 10 2025 Malnutrition is responsible for more than half of all deaths in children under the age of five worldwide. Those who survive can still experience lifelong consequences like cognitive and developmental delays, impaired academic performance, economic instability, and negative maternal health outcomes. This enormous public health issue demands solutions. The latest studies point to gut microbiome-the diverse bacteria, viruses, and other microbes living in our intestines-