Longevity Optimization with Kayla Barnes-Lentz Dr. Will Bulsiewicz, MD - The #1 Nutrient for Longevity That Everybody Still Ignores
Jan 1, 2026
Dr. Will Bulsiewicz, MD, is a prominent gastroenterologist and bestselling author specializing in gut health. He discusses his inspiring journey from a struggling doctor to a gut health advocate, highlighting the critical role fiber plays in longevity. With 95% of Americans fiber deficient, he shares the shocking impacts of hyperpalatable foods on overeating. Will provides practical strategies for boosting fiber intake, the benefits of resistant starch, and how quickly dietary changes can improve gut microbiome health.
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Treat Motility, Not Just Acid
- If you have heartburn, don't just suppress acid long-term; address underlying motility issues first.
- Challenge prolonged proton pump inhibitor use and work with your doctor to stop them when appropriate.
Meeting His Wife Sparked A Diet Turnaround
- Will changed his health after meeting his now-wife and adopting plant-forward smoothies and whole foods.
- He regained energy, improved workouts, and reversed metabolic issues by shifting diet away from processed foods.
Ultra-Processed Foods Hijack Appetite
- Ultra-processed foods are engineered to hijack satiety and drive overeating.
- Dr. Will cites research showing hyperpalatable diets cause ~500 extra calories consumed per day versus whole foods.