Dr. John E. Lewis: The Importance of Polysaccharides for Brain Health, Immune Function, and Quality of Life
Release Date: 07/06/2026
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info_outlineThis week, Tee is joined by Dr. John E. Lewis, PhD, founder and president of Dr. Lewis Nutrition, clinical nutrition researcher, and author of more than 180 peer-reviewed scientific publications. With a career spanning decades in nutrition, exercise science, and human health, Dr. John has dedicated his life to studying how nutrition can influence aging, cognitive function, and overall wellness. In this fascinating conversation, he shares how his journey from competitive bodybuilding to scientific research led him to discover the powerful role of polysaccharides—complex carbohydrates found in plants such as aloe vera and rice bran.
In this chat, Dr. John explains why not all sugars are created equal and breaks down the science behind polysaccharides, which he describes as some of nature’s most sophisticated and beneficial compounds. He discusses how these plant-derived nutrients support immune regulation, reduce chronic inflammation, nourish the gut microbiome, and influence cellular communication throughout the body. He also shares why aloe vera has earned the title of “the plant of life” in his research and how both aloe and rice bran have been used for centuries for their healing properties.
The conversation also explores Dr. John’s groundbreaking research at the University of Miami involving individuals with moderate to severe Alzheimer’s disease. He discusses findings that showed significant improvements in cognitive function, reductions in inflammatory markers, enhanced immune function, and increased adult stem cell production. In addition, Dr. Lewis shares his personal journey to a plant-based lifestyle, challenges common misconceptions about nutrition and protein, and explains why he believes food remains one of the most powerful tools available for improving healthspan and quality of life. If you're interested in brain health, healthy aging, nutrition science, and natural approaches to wellness, this episode offers an eye-opening look at emerging research that could reshape how we think about aging and disease prevention.
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