Mailing Address:

Harvard Medical School

Department of Population Medicine

133 Brookline Avenue, 6th Floor

Boston, MA 02215

Phone: 617-509-9841

Fax: 617-859-8112

Staff Assistant:

Szilvia Szegedi 


Assistant Professor, Harvard Medical School 

Faculty Member, Harvard Center for Population and Development Studies

Physician, Brigham and Women's Hospital


Weighing In Blog

Obesity Prevention Program

Jason Block, MD, MPH

I am a general internal medicine physician with training in epidemiology and population health.  Working with interdisciplinary teams, my research follows two tracks – examining the geographic influences on the obesity epidemic and intervening in multiple settings to promote weight loss and overall wellness, especially at the environmental level.  I have completed studies on the geographic distribution of food establishments and whether proximity to food establishments is associated with body weight in several cohorts, especially the Framingham Heart Study Offspring Cohort.  On the intervention front, I am exploring point-of-purchase interventions or policies to improve dietary choices in workplaces and food establishments.  I have conducted several studies in workplace cafeterias, exploring whether price adjustments, educational messaging, or alterations in the presentation of products changes purchasing patterns of healthy and unhealthy foods.  I also am evaluating the coming federal regulation that will require calories to be posted on menus in chain restaurants and exploring financial incentives for weight loss and overall wellness, both through health insurance-based incentives and direct financial incentives, at several workplaces. 

Selected Publications: