Clinical Nutrition

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Johanna Dwyer, DSc, RD


Research Interests Flavonoids and chronic disease, dietary supplements, nutritional assessment
Board Certifications Registered Dietitian
Gender Female
Language(s) Spanish, French

Publications + National Presentations

1. Bailey RL, Gahche JJ, Miller PE, Thomas PR, Dwyer JT. Why US adults use dietary supplements. JAMA Internal Medicine (formerly Archives of Internal Medicine). 2013;173(5):355-361.

2. Dwyer J, Nahin RL, Rogers GT, Barnes PM, Jacques PM, Sempos CT, Bailey R. Prevalence and predictors of children’s dietary supplement use: The 2007 National Health Interview Survey. Am J Clin Nutr. 2013;97:1331-7. doi:10.3945/ajcn.112.052373.

3. Sempos C, Durazo-Arvizu RA, Dawson-Hughes B, Yetley EA, Looker AC, Schleicher RL, Cao G, Burt V, Kramer H, Bailey RL, Dwyer JT, Zhang C. Gahche JJ, Rovner AJ, Coates PM, Picciano MF. Is there a reverse J-shaped association between 25-hydroxyvitamin D and all-cause mortality? Results from the US National Representative NHANES. J Clin Endocrin Metab. First published ahead of print May 2013 as doi:10:10/jc.2013-1333.

4. Gahche JJ, Bailey RL, Mirel LB, Dwyer JT. The prevalence of using iodine-containing supplements is low among reproductive-age women, National Health and Nutrition Examination Survey 1999-2006. J Nutr. 2013;143:872-877. doi:10:3945/jn.112.169326.

5. Bailey RL, Gahche JJ, Thomas PR, Dwyer JT. Why US children use dietary supplements. Pediatric Research. 2013.

6. Jacques PF, Cassidy A, Rogers G, Peterson JJ, Meigs JB, Dwyer JT. Higher dietary flavonol is associated with lower incidence of type 2 diabetes. J Nutr. 2013.

7. Dwyer JT, Peterson J. Tea and Flavonoids: where we are, where to go next. AJCN. October 2013:98:1-9 (supplement).

8. Au LE, Rogers GT, Harris SS, Dwyer JT, Jacquest PF, Sacheck JM. Associations of vitamin D intake with 250HD by weight status and race/ethnicity in US children. JAND. 2013 Nov;113(11):1511-16.

9. Murphy MM, Spungen JH, Barraj LM, Bailey RL, Dwyer JT. Revising the daily values may affect food fortification and in turn nutrient intake adequacy. J Nutr. 2013. Doi:10.3945/jn.113.181099.

10. Au Le, Harris SS, Dwyer JT, Jacques PF, Sacheck JM. Adherence to a vitamin D supplement intervention in urban school children. JAND. 2014 Jan:114(1):86-90. Berner L, Keast D, Bailey R, Dwyer J. Fortified foods are major contributors to nutrient intakes in diets of US children and adolescents. JAND. Published on line 2014 Jan; 10.1016/j.jand.2013.10.012.

11. J, Woteki C, Bailey R, Britten P, Carriquiry A, Gaine P, Miller D, Moshfegh A, Murphy M, Smith Edge M. Fortification: new findings and implications. Nutr. Rev. Published online 2014 Jan; doi:10.111/nure.12086.


Dr. Johanna Dwyer is Professor of Medicine (Nutrition) and Community Health at the Tufts University Medical School, and Professor of Nutrition at Tufts University Friedman School of Nutrition Science and Policy. She is also Senior Scientist at the Jean Mayer/USDA Human Nutrition Research Center on Aging at Tufts University. Her major research interest is in flavonoids, population based nutrition surveys, and nutrition policy. Dr. Dwyer is the Director of the Frances Stern Nutrition Center at Tufts Medical Center which is one of the oldest dietetic internship programs and outpatient nutrition clinics in the USA. She served as Dietetic Internship Director there from 1974 to 2009. From 2003-2011, Dr. Dwyer served part time as Senior Nutrition Scientist, Office of Dietary Supplements, National Institutes of Health. She now serves as a Scientific Consultant in the same capacity where she is responsible for several large projects, including studies of dietary supplement motivation and use, development of an analytically substantiated dietary supplement database and other dietary supplement databases, development of research on the assessment of dietary supplement intake and other topics, including national population-based surveys.

Dwyer received her D.Sc. and M.Sc. from the Harvard School of Public Health, an M.S. from the University of Wisconsin, and completed her undergraduate degree with distinction from Cornell University. She is the author or coauthor of more than 250 research articles and 300 review articles published in scientific journals on topics including dietary treatment of end-stage renal disease, the role of dietary flavonoids in health
preventing diet-related disease in children and adolescents
maximizing quality of life and health in the elderly
vegetarian and other lifestyles, and databases for bioactive substances other than nutrients. She also serves as the editor of Nutrition Today.

Dr. Dwyer has served on many committees, including the 2000 Dietary Guidelines for Americans Committee. She served as a member of the Food and Nutrition Board of the National Academy of Sciences, was elected member of the Institute of Medicine National Academy of Sciences in 1998, and served as Councilor of the Institute of Medicine from 2001-2003. She received the Conrad V Elvejhem Award for public service in 2005 from the American Society for Nutrition Sciences, the Alumni Award of Merit from the Harvard School of Public Health in 2004, the WO Atwater award in 1996, the Medallion Award of the American Dietetic Association in 2003 and was recently honored with the Dean’s Medal from the Tufts University Friedman School of Nutrition Science and Policy.

Professional Memberships

Office of the Director Award for Dietary Supplement Label Database, NIH (2014)
Member, Institute of Medicine, National Academy of Sciences
Public Trustee, ILSI North America
Editor, Nutrition Today
Conrad V Elvejhem Award for Public Service, American Society for Nutrition Sciences
Editorial Board, Nutrition and Cancer
Robert Wood Johnson Health Policy Fellow, National Academy of Sciences