Josiemer Mattei
Associate Professor

Josiemer Mattei

Donald and Sue Pritzker Associate Professor of Nutrition



Dr. Mattei is the Donald and Sue Pritzker Associate Professor of Nutrition at the Department of Nutrition, Harvard T.H. Chan School of Public Health. She investigates the genetic, dietary, and psychosocial risk factors of obesity, type 2 diabetes, cardiovascular disease, and allostatic load in racial and ethnic groups as well as underserved and minority populations, as a framework to explain health disparities. Her emphasis is on Hispanics/Latinos in the U.S. and Latin America. Her multiple projects include longitudinal cohort studies in Puerto Rico, mixed-methods projects on diet, stress, and weight stigma, collaborations with epidemiological cohorts of Hispanics/Latinos in the Unites States, and culturally-tailored dietary interventions to prevent type 2 diabetes and heart disease in Boston and Puerto Rico. Her work extends to several Latin American countries through collaborative partnerships. Dr. Mattei promotes evidence-based policy and programs for chronic disease prevention in Puerto Rico and US-Latino communities. Her ultimate goal is to help Latinos and other ethnic and minority populations eat healthy and be healthy.

Dr. Mattei’s productive body of work was recognized in 2016 with a Mark Bieber Award for Outstanding Nutrition-related Research by the American Heart Association, of which she is recognized as a Fellow (FAHA), and the 2019 Paul Sorlie Early Career Investigator Award from HCHS/SOL. Dr. Mattei is deeply involved in mentoring students and postdocs, and in enhancing the graduate learning and research experience. Dr. Mattei works diligently towards the inclusion and advancement of under-represented groups in epidemiological and community studies, of minority students in public health education, and of women and minorities in science and academia.

BS, Industrial Microbiology
University of Puerto Rico, Mayagüez, Puerto Rico

MPH, Epidemiology and Biostatistics
School of Medicine, Tufts University, Medford, Massachusetts

MS, Nutritional Biochemistry and Metabolism-Specialization in Genetics
Tufts University, Medford, Massachusetts

PhD, Nutritional Biochemistry and Metabolism
Friedman School of Nutrition, Tufts University, Medford, Massachusetts



Researching chronic disease in the aftermath of a hurricane

One year after Hurricane Maria devastated Puerto Rico, a large observational study will document the development of cardiovascular and other chronic diseases among the island’s adult population. When compared to the general U.S. population and residents of other…

Energy drinks: Health downsides not worth the extra pep

Consuming energy drinks may increase the risks of a wide range of health problems, including poor mental health, substance abuse, diabetes, tooth decay, high blood pressure, and kidney damage, according to Harvard T.H. Chan School of Public Health…