Dr. Sarah Mitchell is a Registered Dietitian (RD) and sports nutrition researcher with over 10 years of experience in clinical nutrition and body composition science. She serves as the Nutrition & Body Composition Editor at Fitness Royale, where she oversees all nutrition-related content and ensures recommendations are grounded in peer-reviewed research.
After completing her PhD in Sports Nutrition at Cornell University, Dr. Mitchell spent six years at a leading research hospital investigating the relationship between macronutrient timing, body composition, and metabolic health. Her research has been published in 15+ peer-reviewed journals including the Journal of the International Society of Sports Nutrition and the American Journal of Clinical Nutrition.
Dr. Mitchell's expertise spans weight management, metabolic health, sports nutrition, and body composition assessment. She is passionate about translating complex nutrition science into practical, actionable guidance that everyday people can follow.
Credentials
- Registered Dietitian (RD) — Commission on Dietetic Registration
- ISSN-Sports Nutrition Specialist (ISSN-SNS) — International Society of Sports Nutrition
- Certified Specialist in Oncology Nutrition (CSO) — Commission on Dietetic Registration
- Board Certified Specialist in Sports Dietetics (CSSD) — Commission on Dietetic Registration
Experience
- Nutrition & Body Composition Editor, Fitness Royale (2025–Present) — Oversees nutrition content, reviews all dietary recommendations for scientific accuracy.
- Senior Research Scientist, Clinical Nutrition Lab (2019–2025) — Led studies on macronutrient timing, body composition assessment methods, and metabolic health biomarkers.
- Registered Dietitian, University Hospital (2016–2019) — Provided medical nutrition therapy for patients with obesity, diabetes, and metabolic syndrome.
- Sports Nutrition Consultant (2014–2016) — Worked with collegiate athletes on performance nutrition, hydration, and recovery protocols.
Education
- PhD in Sports Nutrition — Cornell University (2016)
- MS in Nutrition Science — Columbia University (2012)
- BS in Dietetics — Penn State University (2010)
- Dissertation: "Macronutrient Timing and Body Composition Changes in Resistance-Trained Adults"
Selected Publications
- Mitchell, S. et al. (2023). "Protein Timing and Muscle Protein Synthesis: A Systematic Review." Journal of the International Society of Sports Nutrition, 20(1).
- Mitchell, S. & Chen, A. (2022). "Body Composition Assessment Methods: Comparing DXA, BIA, and Circumference Measurements." American Journal of Clinical Nutrition, 115(3).
- Mitchell, S. et al. (2021). "Metabolic Adaptation During Caloric Restriction: Implications for Weight Maintenance." Obesity Reviews, 22(4).