Deirdre Kay Tobias
Assistant Professor

Deirdre Kay Tobias

Assistant Professor in the Department of Nutrition


Other Positions

Assistant Professor of Medicine


Brigham and Women's Hospital


Dr. Deirdre Tobias is an obesity and nutritional epidemiologist at the Brigham and Women's Hospital and Harvard Medical School in Boston. She received her doctorate and postdoctoral training at the Harvard T.H. Chan School of Public Health, Boston, MA. Dr. Tobias was appointed the Academic Editor for the American Journal of Clinical Nutrition in 2019. Her research focuses on the role of diet and lifestyle for obesity and its major chronic diseases, including gestational diabetes and type 2 diabetes, and has been published in leading peer-reviewed journals including the New England Journal of Medicine and Journal of the American Medical Association. She contributes to the development and analyses of healthful dietary patterns, metabolomics, and nutrition epidemiologic methods, and is co-Instructor of Nutritional Epidemiology at the Harvard TH Chan School of Public Health.

BA, 2005, Premed, psychology
College of the Holy Cross, Worcester, MA

MSc, 2009, Epidemiology
Harvard TH Chan School of Public Health, Boston, MA

ScD, 2011, Nutritional Epidemiology; Epidemiology
Harvard TH Chan School of Public Health, Boston, MA


Dairy consumption, plasma metabolites, and risk of type 2 diabetes.

Drouin-Chartier JP, Hernández-Alonso P, Guasch-Ferré M, Ruiz-Canela M, Li J, Wittenbecher C, Razquin C, Toledo E, Dennis C, Corella D, Estruch R, Fitó M, Eliassen AH, Tobias DK, Ascherio A, Mucci LA, Rexrode KM, Karlson EW, Costenbader KH, Fuchs CS, Liang L, Clish CB, Martínez-González MA, Salas-Salvadó J, Hu FB.

Am J Clin Nutr. 2021 Jul 01. 114(1):163-174. PMID: 33742198


Healthy lifestyle may cut gestational diabetes cases by half

Healthy lifestyle habits—maintaining a normal weight, not smoking, and staying physically active—may help prevent about half of all diabetes cases that develop in pregnant women, according to a new study. Looking at data from more than 14,000 American…