Tonya Orchard

Headshot of Tonya Orchard

Associate Professor, Department of Human Sciences

Program Area: Human Nutrition

(614) 292-7241


Dr. Tonya Orchard is a registered dietitian with more than 20 years of experience in clinical nutrition, nutrition counseling and consulting. She is currently the director of the Didactic Program in Dietetics and an assistant professor of human nutrition at The Ohio State University. Her research examines dietary prevention and treatment of chronic inflammatory conditions with a focus on alleviating cancer treatment-related side effects with nutritional interventions; fatty acids and musculoskeletal conditions.


  • PhD, Human Nutrition, The Ohio State University, 2011
  • MS, Human Ecology, Specialization in Human Nutrition, The Ohio State University, 2006
  • BS, Medical Dietetics, The Ohio State University,1986

Licensure and Registration

  • L.D. Licensed Dietitian, State of Ohio, Ohio Board of Dietetics
  • R.D. Registered Dietitian, Academy of Nutrition and Dietetics

Research Interests

Research Summary

Orchard's current projects includes research into:

  • dietary prevention and treatment of chronic inflammatory conditions, with a focus on fatty acids and musculoskeletal diseases and conditions affecting women's health; and
  • prevention of chemotherapy-induced side effects with diet.

Selected Publications

  • Weinhold KR*, Light S*, Bittoni AM, Zick S, Orchard TS**. A remote whole food dietary intervention to reduce fatigue and improve diet quality in lymphoma survivors: results of a feasibility pilot study. Nutr Cancer. 2023 Feb 8:1-11. **Corresponding Author.
  • Weinhold, K. R., Andridge, R. R., Bomser, J. A., Sasaki, G. Y., Bruno, R. S., & Orchard, T. S. (2022). Sugars measured enzymatically in a fasting overnight urine sample are not sensitive biomarkers of dietary added sugar intake in postmenopausal women. Nutrition and health, 2601060221106819. Advance online publication.
  • Robinette, L. M., Hatsu, I. E., Johnstone, J. M., Tost, G., Bruton, A. M., Leung, B., Odei, J. B., Orchard, T., Gracious, B. L., & Arnold, L. E. (2022). Fruit and vegetable intake is inversely associated with severity of inattention in a pediatric population with ADHD symptoms: the MADDY Study. Nutritional Neuroscience, 1–10. Advance online publication.
  • Chen C, Kaufman J, Hayden K, Espeland M,  Whitsel E, Serre M, Vizuete W, Orchard T, Wang X, Chui H, D’Alton M, Chen J, He K. Adherence to a MIND-Like Dietary Pattern, Long-Term Exposure to Fine Particulate Matter Air Pollution, and MRI-Based Measures of Brain Volume: The Women’s Health Initiative Memory Study-MRI. Environ Health Perspect. 2021 Dec;129(12).
  • Ormiston K*, Gaudier-Diaz MM, TinKai T, Fitzgerald J, Cole RM, Andridge R, Lustberg M, DeVries AC, and Orchard TS**. Effects of plant-based versus marine-based omega-3 fatty acids and sucrose on brain and liver fatty acids in a mouse model of chemotherapy. Nutr Neurosci. 2021 Nov 12:1-9.
  • George MA, Lustberg MB, Orchard TS. Psychoneurological symptom cluster in breast  cancer: the role of inflammation and diet. Breast Cancer Res Treat. 2020 Nov;184(1):1-9.
  • Cheng Chen, Pengcheng Xun, Joel D Kaufman, Kathleen M. Hayden, Mark A. Espeland, Eric A. Whitsel, Marc L. Serre, William Vizuete, Tonya Orchard, William Harris, Xinhui Wang, Helena C. Chui, Jiu-Chiuan Chen, and Ka He. Erythrocyte omega-3 index, ambient fine particle exposure and brain aging. Neurology. 2020 Aug 25;95(8):e995-e1007.
  • Johnson KM, Weinhold KR, Andridge R, Arnold K, Chu PP, Orchard TS**. Associations of erythrocyte polyunsaturated fatty acids with inflammation and quality of life in post-menopausal women with obesity completing a pilot dietary intervention. Nutrients. 2019 Jul 12;11(7). **Corresponding Author.
  • Orchard TS**^, Gaudier-Diaz MM^, Phuwamongkolwiwat-Chu P*, Andridge R, Lustberg MB, Bomser J, Cole RM, Belury MA, DeVries AC. Low Sucrose, Omega-3 Enriched Diet Has Region-Specific Effects on Neuroinflammation and Synaptic Function Markers in a Mouse Model of Doxorubicin-Based Chemotherapy. Nutrients. 201810:2004, 2018. *Student or Staff in Orchard Lab, **Corresponding Author. ^Equal Contributors.
  • Arnold, K*; Weinhold, KR*; Andridge, RR; Thompson, KM*; Orchard, TS**. Improving diet quality is associated with decreased inflammation: findings from a pilot intervention in postmenopausal women with obesity. J Acad Nutr Diet, 2018 Nov; 118(11):2135-2143.*Student or Staff in Orchard Lab, **Corresponding Author. 

Selected Presentations

  • The Academy of Nutrition and Dietetics Food and Nutrition Conference and Expo, Denver, Colorado, Oct. 2023 Poster Presentation: Higher Added Sugar Intake is Associated with Worse Attention and Working Memory in Breast Cancer Survivors
  • Women’s Health Initiative Investigator Meeting, Bethesda, MD, May 2019 Dietary fatty acids, fatty acid biomarkers and risk of total knee or hip arthroplasty; pairing WHI and CMS data.
  • American Society for Nutrition Annual Meeting, Boston, MA, June 2018 Poster Presentation: An omega-3 enriched diet decreases chemotherapy-induced neuroinflammation in a mouse model.
  • National Public Radio (NPR); All Sides with Ann Fisher, Columbus, OH, Feb. 2017Invited Interview: The Dietary Inflammatory Index and bone health.
  • Chulalongkorn University Graduate Seminar Series, Bangkok, Thailand, Dec. 2015 Invited Oral Presentation: The impact of omega-3 fatty acid supplementation and diet quality on inflammatory side effects of breast cancer treatment.