Nanci Guest, PhD, RD, CSCS

Nanci Guest photo

Nanci Guest

Researcher, Registered Dietitian and Strength and Conditioning Coach

University of Toronto, Private Practice

Dr. Nanci Guest is a registered dietitian focused on plant-based eating for health and sports performance. She is also a personal trainer and a strength and conditioning coach working in private practice for over two decades. She completed two Bachelor of Science degrees and a Master of Science degree at the University of British Columbia, in the areas of agriculture, dietetics/kinesiology and nutritional sciences. Her doctoral research focused on nutrigenomics and athletic performance, at the University of Toronto, where she also received the 2019 Dr. Michael C. Archer Award for Research Excellence. She continues to do research in plant-based eating in her post-doctoral fellowship also at the University of Toronto. She develops and teaches sport nutrition and plant-based courses at the college level, and she is a global consultant to professional and amateur athletes and teams. She served as the head dietitian at the Vancouver 2010 Olympics and Toronto 2015 PanAm games and prepared several athletes for the last four Olympics.


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