About the Author

Ivor Cummings is a world-renowned chemical engineer with a long career in the medical device and other industries. Although he has been in many roles as technical leader, his specialty is leading teams in complex problem-solving efforts. Ivor trained at University College Dublin and graduated in 1990. His first six years were spent in the development and optimization of medical devices such as hemodialysis units, hemo-perfusion cartridges, and coronary stent assemblies. In recent years Ivor has continued his professional development by becoming a Chartered Engineer (CEng) and Project Management Professional (PMP); he also completed an Innovation and Entrepreneurial Management Certificate with Stanford University. In 2015, he was one of 6 candidates shortlisted from 500 for the title of Irish Chartered Engineer of the Year. Ivor lives in Dublin, Ireland, with his wife and five children.

Jeffry Gerber, MD, FAAFP, is a board-certified family physician and owner of South Suburban Family Medicine in Littleton, Colorado. He is widely known as Denver's Diet Doctor. Dr. Gerber has been providing personalized healthcare to to his community since 1993 and continues that tradition with an emphasis on longevity, wellness, and prevention. For decades, Dr. Gerber has researched the science of carbohydrate and fat metabolism, insulin resistance, inflammation, and chronic metabolic disease. He redefines healthy nutrition and teaches patients about the relationship between unhealthy refined and processed foods and chronic illness. He has used the science in his practice, hugely optimizing his patients' health outcomes by helping them improve their health and optimize their weight with prescribed lifestyle modifications. Frustrated with spiraling healthcare costs related to the treatment of conditions including overweight, obesity, diabetes, atherosclerosis, and heart disease, Dr. Gerber focuses on prevention and treatment programs using low-carb/high-fat (LCHF), Ancestral, Paleo, and Primal diets to treat and prevent these chronic conditions. He rigorously maintains a database of patients, looking at weight loss and improved cardio-metabolic markers, demonstrating the benefits of these types of diets. Dr. Gerber trained at Temple University School of Medicine in Philadelphia and graduated in 1986. He is a member of the American Academy of Family Physicians (AAFP), the American Society of Bariatric Physicians, the Obesity Action Coalition, the Colorado Academy of Family Physicians, the Colorado Medical Society, the Arapahoe-Douglas-Elbert Medical Society, and the Weston A. Price Foundation. In 2010, Dr. Gerber received the honorary Degree of Fellow from the AAFP for his commitment to family medicine and contributions to the local community. Dr. Gerber, his wife, and their three children love the outdoors and enjoy all that the state of Colorado has to offer.