Aging, Nutrition & Memory with John Lewis, Ph.D.
Aging, Nutrition & Memory with John Lewis, Ph.D.  
Podcast: Silver Disobedience® Perception Dynamics with Dian Griesel: How People Think, Lead and Succeed
Published On: Mon May 18 2026
Description: Aging, Memory & Nutrition: Dr. John Lewis on Vitamin D/K2, Fiber, and Aloe/Rice Bran Polysaccharides in Alzheimer’s ResearchIn this SilverDisobedience© Perception Dynamics™ podcast Host Dian Griesel interviews John Lewis, Ph.D. about aging, memory, and nutrition; challenging overhyped high-protein advice for largely sedentary Americans while emphasizing key needs like vitamin D (noting widespread deficiency); and, pairing D3 with K2 to direct calcium into bones. They discuss the importance of dietary fiber for gut transit time and potential disease-risk reduction, and Dr. Lewis argues most essential nutrients come from plants, with B12 and K2 synthesized by bacteria. Dr. Lewis describes 20 years of research on complex polysaccharides from aloe vera and rice bran and a 12-month clinical trial in 34 people with moderate to severe Alzheimer’s showing significant ADAS-Cog improvements at 9 and 12 months, along with blood-marker changes including improved CD4:CD8 ratio, reduced TNF alpha and VEGF, and a 286% increase in CD14 cells. He explains the nutrition model of supporting the body with raw materials, notes funding barriers in academia, and shares his company, Dr. Lewis Nutrition, and its flagship formulation.Learn more here: https://drlewisnutrition.com/Please SUBSCRIBE! I’m Dian Griesel, Ph.D. aka @SilverDisobedience to my hundreds of thousands of monthly blog readers. You can learn more about me here:   ⁠https://diangriesel.com⁠ But for starters…I am a perception analyst, counselor, hypnotherapist, author of 16 books and a Wilhelmina model. For 30 years I have helped my clients to achieve greater understanding as to how perceptions impact everything we do whether personally or professionally."Raw, truth-driven conversations with fascinating guests — from business & psychology to careers, pop culture & the B.S. in between." Expect bold questions. Unfiltered insights. A few laughs. Real growth. Subscribe & Join the Conversation.Show Run: 00:00 Aging and Memory Fears00:41 Protein Needs With Age04:18 Vitamin D3 and K2 Essentials06:46 Fiber and Gut Health08:22 Ideal Diet Plant Based Debate14:07 Supplements and Research Origins15:01 Aloe Polysaccharides Discovery18:45 What Polysaccharides Really Are24:42 Alzheimers Trial Results30:15 Cellular and Immune Markers34:37 Funding Roadblocks and Mission36:42 Where to Learn More Closing