Nanci Guest

About Nanci Guest

Nanci Guest, MSc, RD, CSCS is a registered dietitian specializing in sport, a certified personal trainer, a strength and conditioning coach, and a PhD candidate completing research on nutrigenomics and athletic performance at the University of Toronto. She is a global consultant to high-performance athletes, served as the head dietitian at the Vancouver 2010 Olympics and Toronto 2015 PanAm Games, and prepared several athletes for the last four Olympics: London, Sochi, Rio, and PyeongChang. Nanci is on the scientific advisory board for Nutrigenomix Inc., a Toronto-based genetic testing company, and she has offered nutrigenomics testing in her practice for the past five years.

You can reach her at and on Twitter at @NanciGuestRD.