John E. Lewis, Ph.D. — Nutrition Scientist & Researcher
John E. Lewis, Ph.D. is the Founder and President of Dr Lewis Nutrition®.
I have spent my career at the intersection of nutrition science and human health — running clinical trials, publishing peer-reviewed research, and translating that science into products and guidance that help real people. I built Dr Lewis Nutrition® because I believe the gap between what peer-reviewed nutrition science shows and what most people actually do is one of the most consequential problems in health today.
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Professional Career
Dr. Lewis is the Founder and President of Dr Lewis Nutrition® and past
full-time Associate Professor in the Department of Psychiatry and Behavioral Sciences and now Voluntary Associate Professor in the Department of Family Medicine and Community Health at the University of Miami Miller School of Medicine. He is a Diplomate, Faculty Member, and Advisor of the Medical Wellness Association. He has been the principal investigator of over 30 different studies on human health in his research career. During that time, he either directly raised or indirectly supported raising over $23 million in grants, gifts, and contracts for research studies and clinical trials and educational programs for medical students. In addition to his research, Dr. Lewis has been an invited national and international lecturer and guest speaker at conferences and as a guest on television shows. He is a well-known author with over 180 peer-reviewed publications in some of the world’s leading scientific journals. He has also mentored many different students, from undergraduates to post-doctoral trainees, in not only how to conduct clinical research but to apply the principles of health promotion into daily practice.
For more information about Dr. Lewis’s career, including his scientific publications, please see his academic CV here.
Landmark research
Journal of Alzheimer's Disease
Research Interests
My research has focused on evaluating the effects of nutrition, dietary supplements, and exercise on human health — particularly brain health, immune function, and metabolic wellness. Over the course of my career I served as principal investigator on more than 30 clinical studies, working with colleagues to find natural, physiologically aligned approaches to helping people achieve and maintain health.
A defining moment came when I ran a landmark 12-month clinical trial testing an aloe polysaccharide multi-nutrient complex in persons with moderate to severe Alzheimer's disease. The results were striking enough that I chose to leave a full-time academic career to pursue what became Dr Lewis Nutrition® — because the opportunity to reach and help people at scale simply was not possible inside the walls of a university.
I have published over 180 peer-reviewed articles in some of the world's leading scientific journals and have been an invited lecturer at national and international conferences. I have also mentored graduate and post-doctoral students in clinical research methodology and health promotion practice.
View my full academic CV →
View all publications on Google Scholar →
Why I founded Dr Lewis Nutrition®
I maintain my academic affiliation because the science never stops — but I left full-time research because I realized the gap between what peer-reviewed nutrition science shows and what most people actually do is enormous, and closing that gap requires more than publishing papers. Dr Lewis Nutrition® is my vehicle for translating decades of research into practical guidance and science-backed products for people dealing with brain health challenges, immune dysfunction, and metabolic disease.
I personally follow a whole-food, plant-based diet — something I have done for over 27 years. I take Daily Brain Care daily and maintain a rigorous daily exercise program. I do not recommend anything I have not studied, tested, or applied myself.