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Hamed Samavat completed his dietetic internship with a focus on eating disorders at the University of Minnesota- The Emily Program. He received his Masters and Doctoral degrees in Nutrition Sciences from the University of Minnesota- Twin Cities. He further completed an NIH post-doctoral training at the University of Pittsburgh Medical Cancer- Hillman Cancer Center with a focus on nutrition and cancer prevention.
He has conducted research in both clinical and observational (nutritional epidemiology) settings assessing the role of dietary factors in the etiology and prevention of cancer and cardiovascular diseases. Dr. Samavat is teaching graduate-level nutrition courses including Human Metabolism and Body Composition (NUTR 7210) and Applied Clinical Nutrition Statistics (NUTR 6481) in the Fall semester, and Vitamin and Mineral Metabolism (NUTR 6300) and Nutrition Across the Lifespan (NUTR 5300) in the Spring semester. He also mentors masters and doctoral of clinical nutrition students.
Ph.D., MSc, RDN, LDN, University of Minnesota-Twin Cities
| Reg Certificate Type | Reg Certificate Number |
| Registered Dietitian | 86025893 |
| Award | Year |
| National Cancer Institute (NCI) Post-doctoral Training Fellowship Award in Cancer Etiology and Prevention | 2017 |
| Department of Defense, Individual Breast Cancer Predoctoral Traineeship Award, USA, | 2010-2013 |
| Doctoral Dissertation Fellowship, University of Minnesota | 2014-2015 |
| 30th Annual UPMC Hillman Cancer Center, Scientific Retreat and Satellite Conference, 1st place winner of poster presentation award | 2018 |
| PhenHRIG 2016 Student Phenolic Research Awards, Experimental Biology, San Diego, CA | 2016 |
My primary research interest falls into how potentially modifiable factors, such as diet, nutrition, inflammation, and hormonal exposures, influence women’s health across the lifespan. I have conducted chemoprevention and nutritional and cancer epidemiology research utilizing clinical trials and large prospective cohort studies funded by NIH/NCI.
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Effects of Green Tea Extract Supplementations on Inflammatory Biomarkers in Women Who are Obese and at High Risk of Breast Cancer |
New Jersey Health Foundation |
February 15, 2023 |
Principal Investigator |
1. Samavat H, Kurzer MS. Estrogen metabolism and breast cancer. Cancer Lett. 2015 Jan 28;356(2 Pt A):231-43.
2. Dostal AM, Samavat H, Bedell S, Torkelson C, Wang R, Le CT, Ursin G, Swenson KK, Wu AH, Yuan JM, Kurzer MS. The safety of green tea extract supplementation in postmenopausal women at risk for breast cancer: Results of the Minnesota Green Tea Trial. Food Chem Toxicol. 2015 Sep; 83: 26-35.
3. Samavat H, Dostal AM, Wang R, Bedell S, Emory TH, Ursin G, Torkelson CJ, Gross MD, Le CT, Yu MC, Yang CS, Yee D, Wu AH, Yuan JM, Kurzer MS. The Minnesota Green Tea Trial (MGTT), a randomized controlled trial of the efficacy of green tea extract on biomarkers of breast cancer risk: Study rationale, design, methods, and participant characteristics. Cancer Causes Control. 2015 Oct; 26(10):1405-19.
4. Dostal AM, Samavat H, Espejo L, Arikawa AY, Stendell-Hollis NR, Kurzer MS. Green tea extract and catechol-O-methyltransferase genotype modify fasting serum insulin and plasma adiponectin concentrations in a randomized controlled trial of overweight and obese postmenopausal women. J Nutr. 2016 Jan; 146: 38–45.
5. Samavat H, Newman AR, Wang R, Yuan JM, Wu AH, Kurzer MS. Effects of green tea catechin extract on serum lipids in postmenopausal women: a randomized, placebo-controlled clinical trial. Am J Clin Nutr. 2016 Dec;104(6):1671-1682.
6. Arikawa AY, Samavat H, Gross M, Kurzer MS. Plasma F2-isoprostanes are positively associated with glycemic load, but inversely associated with dietary polyunsaturated fatty acids and insoluble fiber in postmenopausal women. J Nutr. 2017 Sep;147 (9):1693-1699.
7. Zheming Yu, Samavat H, Dostal AM, Wang R, Torkelson CJ, Yang CS, Butler LM, Kensler TW, Wu AH, Kurzer MS, Yuan JM. Effect of green tea extract consumption on liver toxicity: results from a randomized trial in postmenopausal women in the United States. Cancer Prev Res (Phila). 2017 Oct;10(10):571-579.
8. Samavat H, Ursin G, Emory TH, Lee E, Wang R, Torkelson CJ, Dostal AM, Swenson K, Le CT, Yang CS, Yu MC, Yee D, Wu AH, Yuan JM, Kurzer MS. A randomized controlled trial of green tea extract supplementation and mammographic density in postmenopausal women at increased risk of breast cancer. Cancer Prev Res (Phila). 2017 Dec;10(12):710-718.
9. Samavat H, Xun X, Jin A, Wang R, Koh WP, and Yuan JM. Association between prediagnostic leukocyte telomere length and breast cancer risk: the Singapore Chinese Health Study. Breast Cancer Res. 2019 Apr 17;21(1):50
10. Samavat H, Wu AH, Ursin G, Torkelson CJ, Wang R, Yu MC, Yee D, Kurzer MS, and Yuan JM. Green tea catechin extract supplementation does not influence circulating sex hormones and insulin-like growth factor axis proteins in a randomized controlled trial of postmenopausal women at high risk of breast cancer. J Nutr. 2019 Apr 1;149(4):619-627.
11. Samavat H, Luu HN, Beckman KB, Jin A, Wang R, Koh WP, and Yuan JM. Leukocyte telomere length, cancer incidence and all-cause mortality among Chinese adults: Singapore Chinese Health Study. Int J Cancer. 2021 Jan 15;148(2):352-362.
12. Arikawa AY, Galena A, Samavat H, and Kurzer MS. Associations between polymorphisms in phase II enzymes and circulating sex-steroid hormones in white postmenopausal women. J Menopausal Med. 2021 Aug;27(2):79-86.
13. Groesbeck A, Zelig R, Samavat H, , and Brody R. The Perceived Value of the Board Certified Specialist in Renal Nutrition Credential among Registered Dietitian Nutritionists Who Hold the Credential. J Ren Nutr. 2021;S1051-2276(21)00239-9.
14. Hahn M, Samavat H, Parker A, and Zelig R. Vitamin D Status and Cognitive and Functional Outcomes in Patients with Traumatic Brain Injury: A Literature Review. Top Clin Nutr. 2021 October/December; 36 (4):331-345(15).
15. Kenny E, Samavat H, Touger-Decker R, Parrott JS, Byham-Gray L, and August DA. Adverse perioperative outcomes among patients undergoing gastrointestinal cancer surgery: quantifying attributable risk from malnutrition. JPEN J Parenter Enteral Nutr. 2022 Mar; 46(3):517-525.
16. Gallagher D, Parker A, Samavat H, and Zelig R. Prophylactic Supplementation of Phosphate, Magnesium, and Potassium for the Prevention of Refeeding Syndrome in Hospitalized Individuals with Anorexia Nervosa. Nutr Clin Pract. 2022 Apr;37(2):328-343.
17. Acosta L, Byham-Gray L, Kurzer M, Samavat H. Hepatotoxicity with High-Dose Green Tea Extract: Effect of Catechol-O-Methyltransferase and Uridine 5′-Diphospho-glucuronosyltransferase 1A4 Genotypes. J Diet Suppl. 2022 Sep 30:1-20.
18. Hamilton KP, Ziegler J, Samavat H, Wardenaar F, Esopenko C, Womack J, Krystofiak J, Byham-Gray L. Nutritional Supplement Use and Athletic Characteristics among a Sample of NCAA Division I and Division III Student-Athletes. J Diet Suppl. 2022 Nov 3:1-15.
19. Lutes C, Samavat H, Parker A, and Zelig R. The Use of Supplemental Vitamin E to Reduce Radiation-Induced Oral Side Effects in Head and Neck Cancer: A Review of the Literature. Top Clin Nutr. 37(4):p 325-337, October/December 2022.
20. Honeywell S, Samavat H, Touger-Decker R, Parrott JS, Hoskin E, Zelig R. Associations between Dentition Status and Nutritional Status in Community-Dwelling Older Adults [published online ahead of print, 2022 Jan 10]. JDR Clin Trans Res. 2022;23800844211063859.
21. Wiley K, Zelig R, Samavat H, and Rigassio Radler D. Exploring Dietary Patterns with the Rapid Eating and Activity Assessment for Patients (REAP) Tool in a Dental School Clinic. Journal of Dietetic Education.2023. Vol. 1: Iss. 1, Article 2.
22. Bathgate JR, Radler DR, Kurzer M, Samavat H. Green tea extract supplementation does not modify plasma concentration of F2-isoprostanes in women who are postmenopause: Findings from a randomized controlled trial. Nutr Res. 2023 May;113:29-38.
23. Zelig R, Samavat H, Duda P, Singer SR, Feldman C, LaSalle P, Muhammad E, Touger-Decker R. Screening for diabetes risk using the diabetes risk test and point-of-care hemoglobin A1C values in adults seen in a dental clinic. Quintessence Int. 2023 Jun 26;54(6):500-509.
24. Hahn M, Byham-Gray L, Samavat H, Roberts S, Brody R. Small-bore feeding tubes placed with an electromagnetic imaging device leads to cost avoidance and decreased time to initiation of enteral nutrition. Nutr Clin Pract. 2023 Dec, 38(6):1324-1333.
25. Green L, Byham-Gray L, Kurzer M, Samavat H. Exploration of Plasma Adiponectin, Leptin, and COMT Genotype on Blood Pressure Among Women who are Post-Menopause. J Nutr Sci. 2023;12:e100.
26. Wedemire C, Samavat H, Newkirk M, Parker A. Treatment of refractory shock with vitamin B12: A narrative review. Nutr Clin Pract. 2024 Apr;39(2):356-365.
27. Sylvestre J, Newkirk M, Samavat H, Parker A. The Effect of the Single-Anastomosis Duodeno-Ileal Bypass with Sleeve Gastrectomy (SADI-S) on Circulating Concentrations of 25-OH Vitamin D and B12 at One-Year Post-Surgery: A Literature Review. Top Clin Nutr. 39(3):p 259-273, June 2024.
28. Brown T, Johnson T, Gomes A, Samavat H, Byham-Gray L. Knowledge and clinical practice of ASPEN registered dietitian nutritionist members regarding blenderized tube feedings. Nutr Clin Pract. 2024 Jun;39(3):651-664.
29. Zelig R, Lyon A, Touger-Decker R, Singer SR, Samavat H. Dentition and weight status in community-dwelling older adults. Gerodontology. 2024 Dec;41(4):516-525.
30. Ferrell C, Byham-Gray L, Samavat H, Hamdan M. Potential Determinants of Subjective Global Assessment Among Patients on Maintenance Hemodialysis. J Ren Nutr. 2025 Mar;35(2):319-327.
31. Gimbar M, Samavat H, Hamilton KP, Ziegler J, Wardenaar F, Esopenko C, Byham-Gray L. Predictors of Third-Party Tested Nutritional Supplementation Use Among DI and DIII Student-Athletes at a Northeast University. J Diet Suppl. 2025;22(2):310-328.
32. Stewart B, Brody R, Samavat H, Byham-Gray L, Chowdhury N, Mathur S, Singer LG. Relationships Between Nutrition Risk and Frailty in Candidates for Lung Transplant. Clin Transplant. 2025 Jun;39(6):e70205.
33. Zelig R, Swader M, Touger-Decker R, Singer SR, Samavat H. Associations Between Dentition Status and Cardiometabolic Diseases in Adults: A Cross-Sectional Analysis. Front Oral Health. 2026 Jan 30;7:1685373.
34. Tweel LE, Brody R, Samavat H, Day AG, Jiang X, Byham-Gray L, Patel J, Compher C, Heyland DK. The Association Between Protein Dose in the Early and Late Acute Phases of Critical Illness and Time-to-discharge Alive: A Secondary Analysis of a Randomized Clinical Trial. JPEN J Parenter Enteral Nutr. 2026 Feb;50(2):183-191.