Sam Rehnborg, B.S., Ph.D.
President of Nutrilite Health Institute
“Dr. Sam” Rehnborg is the son of Nutrilite founder Carl F. Rehnborg, the scientist who developed NUTRILITE^® supplements. Dr. Sam is a global spokesperson for the NUTRILITE brand and travels the world spreading the word about nutrition and wellness and helping people understand how NUTRILITE food supplements can help optimize diets for better nutritional health. Dr. Sam’s background includes a Bachelor of Science degree in chemical engineering and a doctorate in biophysics from the University of California at Berkeley.

Duke Johnson, M.D.
Dr. Duke Johnson has 20 years of experience in preventive medicine and received his Doctor of Medicine (M.D.) and Master of Kinesiology degrees from UCLA. He is the medical director of the Nutrilite Health Institute. “Dr. Duke” has spoken for Nutrilite all over the world, including Europe, China, and Brazil, and is the personal medical advisor to the Founders Crown Ambassadors, worldwide. He has published research and been a contributing author on three books.

Audra Davies
Audra Davies is manager of Supplement Product Development, Nutrition Research and Development, and a member of the Nutrilite Health Institute in Buena Park, California. She is recognized as a global spokesperson supporting the NUTRILITE brand and the importance of science-based products. Audra has a strong interest in phytochemical research and is committed to furthering the field of phytochemistry through her publications and a conference series. She holds a Master of Science degree in food chemistry and nutritional biochemistry as well as a Bachelor of Science degree in nutritional science from the University of Manitoba, Winnipeg, Manitoba, Canada.

Sean Foy, M.A.
Nutrilite Health and Fitness Specialist
Sean is the president and founder of his own company, a wellness-consulting firm offering fitness consulting and testing, and he develops seminars, programs, and personal training for corporations, hospitals, and universities. An exercise physiologist with a master’s degree in behavioral counseling, Sean has been a consultant to the Nutrilite Health Institute for almost 10 years.

Chet Zelasko, B.S., M.A., Ph.D.
Chet Zelasko (“Dr. Chet”) has been teaching people about health and fitness for over 20 years. He is passionate about sharing health information based on the latest research, in language that’s practical and easy for everyone to understand.

After earning his B.S. from Canisius College, Zelasko completed an M.A. and a Ph.D. in Exercise Physiology and Health Education at Michigan State University. He went on to teach at Buffalo State College and at Ball State, where he was voted a “Top 10 Teacher.” “Dr. Chet” has served as a health and wellness department chair at Buffalo State College, a chief research scientist at an HMO, and most recently, as a weight-loss program manager. He now owns a health and fitness sole proprietorship, Chet Zelasko, Ph.D., LLC. 

Susan Randolph, M.S., R.D.
Susan Randolph has a Master of Science degree in human nutrition and is a registered dietitian. She has 20 years of experience specializing in nutrition communications, education, and behavior modification and has worked in clinical practice, industry, and public relations. Susan earned her M.S. in human nutrition from the University of Bridgeport, Connecticut, and her undergraduate degree from California State University, Northridge. She’s a member of the American Dietetic Association and the American Society for Nutrition as well as two Dietetic Practice Groups: Nutrition in Complementary Care and Dietitians in Business and Communications.

Lisa Kirkman, M.S., R.D.
Lisa Kirkman holds a Master of Science degree in nutrition and a Bachelor of Science degree in dietetics. She has more than 20 years of experience in the field of nutrition and wellness. Her B.S was awarded by the University of Wisconsin, and her M.S. in nutrition was earned at the University of Minnesota. Lisa is a registered dietitian, a certified weight management trainer, and a healthy lifestyle communicator.

Julianne Downes, R.D.
Certified Weight Management Trainer
Julianne Downes is a Registered Dietitian and nutritionist with more than 20 years experience in assisting people with weight management programs. Her educational background, motivational abilities, and knowledge of how to make lasting behavior changes has helped people address and focus on losing weight with the goal of maintaining weight loss indefinitely.

Lisa Goodwin
Amway Global Health Instructor and Co-owner of the Center for Health & Healing
Lisa enjoys helping people make good choices about diet, exercise, and supplementation. She is a health trainer and naturopathic doctor, co-owner of the Center for Health & Healing, and founder of the Success Coaching Group. In addition to her work as a trainer, Lisa is the published author of two study guides for spiritual development and faith.

Micheline Vargas, DrPH, RCEP
Research Scientist: Nutrition Investigation
Nutrilite Health Institute
Dr. Micheline Vargas is a Research Scientist in the Supplement Product Development Department at Nutrilite Health Institute. Her research emphasizes the development of botanical products with functional properties designed to maintain health and well-being. She also develops sports nutrition products.

Yumei Lin, Ph.D., Nutrilite Health Institute
Research Scientist: Investigator
Nutrilite Health Institute
Dr. Lin is a Research Scientist in the Supplement Product Development Department at Nutrilite Health Institute. Her research emphasizes the development of botanical products that have abilities to improve well-being and reduce disease prevalence.

Kenneth Kornman, D.D.S, Ph.D.
President and Chief Scientific Officer, Interleukin Genetics
Dr. Kornman is the founder and Chief Scientific Officer of Interleukin Genetics, a biotechnology company focused on genetic variations that influence immuno-inflammatory and metabolic mechanisms involved in chronic diseases. Dr. Kornman is actively involved in functional genetics research and gene-environment interactions relative to common diseases of aging. This work was instrumental in the development of Gensona™ and Inherent Health™ genetic tests that are currently available to help prevent chronic diseases of aging and improve wellness. He has published more than 100 original papers in peer-reviewed scientific journals, authored three textbooks, retains an academic appointment at Harvard University, and is Editor-in-Chief of the Journal of Periodontology. Dr. Kornman holds twenty U.S. patents on gene variations that regulate chronic diseases and on software methods for modeling complex biological mechanisms.
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