Hannah's research focuses on improving cardiometabolic health at the intersection of science, community, and policy. She seeks to design and evaluate scalable, cost-effective, and policy-relevant interventions to increase healthy food and beverage consumption, increase physical activity and fitness, and reduce health inequities. She focuses on youth-facing policies like mandated physical education, recess, and nutritious meals in public schools, as well as federal programmatic approaches like WIC, CACFP, and SNAP-Ed, that have tremendous potential for both short- and long-term health impact. Her research to date includes a spectrum of observational, intervention, qualitative and quantitative studies involving hundreds of thousands of youth and their families in collaboration with health care, education, public health, and non-profit organizations.