Lisa Goldman Rosas, Ph.D., M.P.H., is an Instructor of Medicine at the Stanford Prevention Research Center where she is also the Research Director for the Program on Prevention Outcomes and Practices. Her research focuses on reducing obesity by discovering and addressing the many factors related to it, particularly upstream determinants that cannot be controlled on the personal level. By revealing such causes, she hopes to find community-based approaches that can reduce high BMI numbers more effectively.