Ms. Nanci Guest

Ms. Nanci Guest

Registered Dietitian
Toronto, ON
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Bio & Education  

Ms. Nanci Guest Bio

2012 - present Currently working on PhD in Nutritional Science, Genetics and Athletic Performance at the University of Toronto. Nutrigenomics is an emerging science that will have significant implications for the athletic population, with direct applicability to dietary and supplement recommendations based on individual genotypes.

1995 - present Owner - Power Play: Fitness Nutrition Performance (Vancouver, BC / Toronto, ON)

Self-employed providing:

• Sport Nutrition Services: Local and international consulting provided to coaches and athletes of all ages and levels, including professional and National-level athletes; create resource materials for the International Olympic Committee, coaches, team doctors, support staff and athletes

• Dietitian/Nutrition services: computerized dietary analyses; individual, family and team counselling; diet plans, grocery store tours and development of information resources

• Personal Training: in-home, health club and outdoor personal training services (all ages and fitness levels)

• Exercise Prescription for Special Populations: supervision and fitness program design for special groups/conditions i.e. heart disease, diabetes, osteoporosis, obesity, pregnancy, post-physiotherapy rehabilitation, children and older adults

• Strength and Conditioning Coaching to Athletes: training a variety of sport disciplines and strategies for competition to athletes of all ages and levels

• Seminars/Presentations: international fitness/dietetic conferences; to athletes, coaches, and various health professionals; to high school/ university/college students, as well as to the general public; topics include advanced sports nutrition, general nutrition, and various health and fitness topics

• Food Product Development: food industry research and development; developed award-winning Optimum® Post-Exercise Recovery Cereal for Nature’s Path® (sold in 8 countries in 2006)

• Articles / Educational materials: national/local publications, websites, newsletters, schools/textbooks – sport nutrition, fitness, nutrigenomics

• Preventive Health Programs – aid in development of health promotion and disease prevention/management programs (through diet and exercise) to include obesity, diabetes, heart disease, osteoporosis and other chronic conditions

• Media Services– TV, radio, webcast, written interviews for various publications in print and online

Featured Contracts

July 2014 – present (Toronto, Canada) Pan Am / Para Pan Am Games 2015 – • Sport nutrition consultant, Athlete’s Village Medical Center on call dietitian

June 2014 – present (Canada) Clif Bar Canada • Senior Sport Dietitian rep • Scientific advisory, media, events, resource development

March 2012 – Jan. 2014 (Canada, USA, Bulgaria, Germany, Switzerland, Austria, Norway) Russian Olympic Committee – Nutrition Consultant for Russian National Winter Sports Teams (approximately 150 athletes) in preparation for Sochi 2014 Winter Olympics • International travel to athlete training camps • Sport nutrition and supplement presentations to coaches, athletes, medical staff • Individualized dietary analyses, diet and supplement program for each athlete • Strength and conditioning program assessments

January 2011 – July 2012 (Canada, USA) Canadian National Women’s Field Hockey Team – Team Dietitian • Traveling with athletes, menu planning, competition preparation (Pan Am 2011, London 2012) • Sport nutrition and supplement presentations to coaches, athletes, medical staff • Individualized dietary analyses, diet and supplement program for each athlete

February 2008 – present (Toronto, Ontario) Pure Fitness - Personal Training and Registered Dietitian Services to club members

May 2006-March 2010 (Vancouver/Whistler, BC) Vancouver 2010 Winter Olympic Games - Director of Sport Nutrition; Head Dietitian • Lead team of volunteer dietitians to prepare for, and service the 2010 games • Research food and nutrition services from past games • Provide nutrition education to food service staff • Athlete’s Village preparation • Menu planning, food labels, special diets, food safety • Ensure food quality, accessibility and variety for athletes • Plan for and carry out nutritional consulting services at Medical Polyclinics – during the 2010 Olympic and Paralympic games • Co-Author of the IOC Nutrition Working Group’s official athlete’s nutrition guide - a reference for dietitians/nutritionists/coaches during the 2010 and future games

October 2001 - present (lecture bi-annual Vancouver, BC, Toronto, Ontario) Canadian Diabetes Association - Certified Diabetes Educator (CDE) Certification Course Presenter for “Diabetes and Exercise” module to educate health care professionals on exercise prescription for patients at their diabetes, heart disease and obesity clinics.

December 2007 – December 2009 (Markham, Ontario) Advantage for Athletes – Strength and Conditioning Coach and Sport Dietitian to over 150 athletes age 10-21 years. Dietitian and personal training services to parents of athletes.

March 2004-May 2006 (Vancouver/Abbotsford, BC) - University Instructor

University of British Columbia - School of Human Kinetics • HKIN 489 (Sports Nutrition)

University of the Fraser Valley - Kinesiology and Physical Education Department • KPE 260 (Introductory Nutrition); KPE 460 (Disease & Nutrition; Sports Nutrition)

Vancouver Canucks NHL Hockey Team - Sport Nutritionist • Sports Nutrition Seminars – new players • One-on-one nutrition consulting • Development of Resource materials (recovery, fueling, supplements, general sports nutrition)


• PhD Candidate (Nutritional Sciences/Genetics/Exercise Performance) University of Toronto – 2016 (estimated year of completion)

• Sport Dietitian Authorized Provider - Coaching Association of Canada - 2013

• Registered Dietitian Member of the College of Dietitians of Ontario - 2011 Member of the College of Dietitians of British Columbia – 2008 Member of Dietitians of Canada - 1999

• Master of Science (Human Nutrition) University of British Columbia – 2004

• Completion of 18 Exercise Science credits (six 3rd/4th year courses) - School of Human Kinetics (Exercise Physiology/Bioenergetics/Health and Fitness) University of British Columbia – 2002

• UBC Dietetics Program: completion of course requirements for dietetic internship University of British Columbia – 1999

• Bachelor of Agricultural Science - major: Animal Science University of British Columbia – 1995


• National Strength and Conditioning Association (NSCA-USA) - Certified Strength and Conditioning Specialist

• Canadian Fitness Professionals Inc. (CANFITPRO) - Certified Personal Trainer

• British Columbia Recreation and Parks Association - Certified Personal Trainer

• American College of Sports Medicine (ACSM) – member

• Canadian Society for Exercise Physiology (CSEP) – member

• Professionals in Nutrition for Exercise and Sport (PINES) - member


• 2014: Genetic testing for personalized nutrition. Cleveland Clinic Journal of Medicine

• 2005: Dietary Restraint and Stress Fractures in Women Runners. International Journal of Sports Nutrition and Exercise Metabolism. Volume 15 (2), page 147-159.

• 2011: Co-author - Nutrition Guide for Youth Olympics. International Olympic Committee

• 2009: Co-author - Nutrition Guide for Olympic Athletes. International Olympic Committee

• 1997-Present: Columnist: Fitness Trainer Canada, Fitness Business Canada, Vancouver View; Frequent Articles: Oxygen, Chatelaine, Impact, Juice, Shape, Active Woman plus various local newspapers/publications, newsletters and numerous websites/blogs

If you are looking for local services or  treatment  in the office or hospital from a Registered Dietitian, contact a provider such as ( Ms. Nanci Guest ) to inquire if they are accepting patients or you need a referral.   Phone number to book an appointment 416.873.3312

The speaker in the video may have no association with ( Ms. Nanci Guest, Registered Dietitian Toronto, ON ). 
( Ms. Nanci Guest, Registered Dietitian Toronto, ON ), may talk about some of the conditions and some of the treatment options shown on the videos. Always talk with your Registered Dietitian about the information you learnt from the videos in regards to High Fibre vs Low Fibre Diet treatments and procedures the Registered Dietitian could  perform and if they would be appropriate for you. Remember good information from your Registered Dietitian  is the corner stone to understanding Protein  in conjunction with your condition or disease.

Please contact ( Ms. Nanci Guest, Registered Dietitian Toronto, ON ) to enquire if this health care provider is accepting new patients.


Ratings for Ms. Nanci Guest

  • 4
    Local Services
    Action Plan
    Was referred to Ms. Nanci Guest, Registered Dietitian, Toronto, ON for help with too much coffee and I found her to be great.
    Submitted: May 21, 2017

Registered Dietitian Health Talks – Take a look at your local options in Toronto

  • nutrition diet
    You may have tried all sorts of diets, but if Weight Loss and Slow Metabolism play a role, you might need help from someone who can assist you with meal planning and nutrition. For more information, you should consider visiting a Registered Dietitian in Toronto, ON, such as Ms. Nanci Guest.

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