Our Team
We are a group of individuals passionate about human health. At the Nutrition Science Group we work with healthcare professionals, media, employers and our education system to improve the current level of self-management of our health. If the public learn about self-management of diet, exercise, sleep and stress, this in turn will save governments billions of dollars spent on healthcare.

Dr Helena Popovic
Author of NeuroSlimming
Dr Helena Popovic is a medical doctor, leading authority on improving brain function, best-selling author, international speaker and media commentator. Her passion is empowering people to live longer, stronger, healthier, and happier. She is the author of NeuroSlimming: Let Your Brain Change Your Body.
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Dr John Stewart
Wellness Coach
Dr. John Stewart, after being diagnosed as pre-diabetic, decided to take charge of his life by starting to eat healthy. He has been rewarded with now normal fasting blood glucose values and a Body Mass Index of 22. He is an advocate of intermittent fasting and finds his periods in ketosis bring him improved mental clarity. His training in nutrition, physiology, pathology, microbiology, and pharmacology as a veterinarian has allowed him an appreciation of cross-species differences between humans and other mammals. He has spent thousands of hours looking at the latest nutrition research and interacting with scientists and healthcare workers.
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Glen Davies
Low Carb and Keto Doctor in General Practice
Runner up New Zealand GP of the year in February 2020, Glen has done great work in the Taupo population assisting particularly the Maori community with reversing type 2 Diabetes and obesity. After graduating from the Otago Medical School in New Zealand, he spent 2.5 years working in a mission hospital in Papua New Guinea. He is a Fellow of the Australasian Society of Lifestyle Medicine and has done ground breaking work using ketosis as a tool for Diabetes reversal and Chronic fatigue syndrome.
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Katherine Stewart
Wellness Coach
Katherine is a warrior for healthy eating, exercise and meditation. She is a registered occupational therapist who finished dux of her class graduating with first class honours. She is also a showjumping rider who as a teenager represented Australia at the World children’s showjumping championships. Katherine walks the talk regarding her low carb high healthy fat eating and is a great role model admired by her friends for overcoming setbacks she has faced.
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Olaf Sorensen
Metabolic Performance, Founder
Olaf Sorensen runs Metabolic Performance from Glenelg, South Australia. He focuses on the benefits of eating a low-carb, high-fat diet, regular fasting, being in ketosis and combining it all with high-intensity exercise. His work with clients comes from years of long-distance running experience.
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Peter Symons
Author of Brain-Fuel Depletion
Peter Symons, an equine veterinarian, developed the Brain-Fuel depletion model that makes sense of anxiety and depression. He wrote the book Brain-Fuel Depletion alongside Dr Clyde Jumeaux to give people relief and understanding on these conditions.
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Steven Hamley
PhD Candidate at Deakin University
Steven Hamley is a PhD candidate at Deakin University researching the pathophysiology of insulin resistance. He has published 8 scientific articles in peer-reviewed journals on topics related to physiology, metabolism, and insulin resistance. His honours thesis research group was the first to demonstrate that only 1 week of a simple diet switch completely reversed pre-diabetes in mice.
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