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Sarah Booth, Ph.D.
Center Director
Senior Scientist


Sarah Booth is Center Director and also holds the positions of Senior Scientist and leads Vitamin K team. Dr. Booth is an expert in vitamin K nutrition research. Her current research involves investigating how vitamins D and K impact Alzheimer’s disease and dementia, and how the gut microbiome contributes to vitamin K status.  Dr. Booth is a professor in the Biochemical and Molecular Nutrition Program at the Friedman School of Nutrition Science and Policy. Dr. Booth is treasurer for the American Society of Nutrition, and in 2018 was awarded ASN’s E.V. McCollum Award for a Senior Investigator.


Roger Fielding, Ph.D.
Associate Center Director
Senior Scientist


Roger Fielding is Associate Center Director and also holds the positions of Senior Scientist and leads the Nutrition, Exercise Physiology, and Sarcopenia (NEPS) team. He is also Professor of Nutrition at the Friedman School of Nutrition Science and Policy, Professor of Medicine at Tufts University School of Medicine and the Associate Director of the Boston Claude D. Pepper Older Americans Independence Center. Dr. Fielding studies the underlying mechanisms contributing to the age-associated decline in skeletal muscle mass, the resultant impact on function, and the potential role of exercise, nutrition, physical activity and other therapies on attenuating this process.


Xiang-Dong Wang, M.D., Ph.D.
Associate Center Director
Senior Scientist


Dr. Xiang-Dong Wang is Associate Center Director and also holds the positions of Senior Scientist and leads the Nutrition and Cancer Biology team. His distinguished research focuses on the cancer-promoting role of tobacco smoking, chronic alcohol intake, and high fat and sugar consumption, as well as the molecular mechanisms underlying the anti-cancer benefits of the bioactive components in fruits and vegetables. He is also a professor in the Friedman School of Nutrition Science and Policy at Tufts University. He has been honored with many awards including the Mary Swartz Rose Senior investigator Award (American Society for Nutrition), the Norman I. Krinsky Award and Fellow Award (International Carotenoid Society.


Naomi Rosenberg, Ph.D.
Special Adviser


Naomi Rosenberg is Dean Emerita of  the Tufts University Graduate School of Biomedical Sciences and Professor Emerita of Molecular Biology and Microbiology at Tufts University School of Medicine where she also served as Vice Dean for Research.  Her research career focused on mechanisms of leukemia development.  She is a Fellow of the American Academy of Microbiology and has held numerous positions at the national level, including chair of the Graduate Research and Training Steering Committee of the American Medical Association and service on the Recombinant DNA Advisory Committee (RAC) of NIH and the Board of Scientific Counselors of the National Cancer Institute.


Mark Wesley
Senior Director of Administration and Finance


Mark Wesley directs all administrative and financial operations at the HNRCA and is responsible for overseeing its $22 million budget.Prior to joining the HNRCA, he was director of financial planning and budgets at the Broad Institute of MIT and Harvard, director of budgeting for Berklee College of Music and business manager at the MIT-Lincoln Lab (Air and Missile Defense Technology Division).