About the Author
Colleen Carkeet, Ph.D., is a senior group leader in Global Regulatory Affairs at Amway. She leads a team of toxicologists and regulatory professionals with responsibilities in product safety, emerging technologies, and durable consumer products. Dr. Carkeet has published several papers on human metabolism of phytonutrients and B vitamins and is a member of the American Society of Nutrition.Kerry Grann, DrPH, is a senior research scientist for nutrition investigations at Nutrilite Health Institute. Her experience in nutrition product development includes the evaluation of new ingredients and service technologies as well as critical review of the scientific literature to substantiate global product claims. Dr. Grann also manages global clinical research products that demonstrate dietary supplementation as a way to help individuals achieve optimal health. R. Keith Randolph, Ph.D., is a technology strategist for the nutrition and beauty product lines marketed through Amway Corporation. Dr. Randolph is a distinguished expert in research for nutritional sciences and biochemistry and is an invited speaker and chair for conferences and symposia focused on nutrition, health, and nutrient–gene interactions. Dawna Salter Venzon, Ph.D., RD, is a nutrition investigator with the Nutrilite Health Institute. Dr. Venzon has received grants to study the brain pathways responsible for hunger and satiety in female adolescents through the use of functional magnetic resonance imaging and has authored several peer-reviewed publications and book chapters on the neural processing of food rewards. Samantha M. Izzy, BSc,is a scientist in nutrition investigation for the Nutrilite Health Institute. Her responsibilities include conducting nutrition-related research, authoring technical documents, and providing scientific substantiation for nutritional supplements designed to maintain optimal health.