Deena Thomas, PhD, MPH, is a Public Health Teaching and Research Fellow within the Division of Nutritional Sciences. Her work focuses on the environmental and social impacts of health. She has worked on projects that measure the effect of fluoride and lead on childhood cognition, and on the interplay of health, income and early retirement among Americas. Dr. Thomas is trained in epidemiology and biostatistics she is interested in using methods from these fields to measure whether nutrients can mitigate the health impact of environmental toxicants.