Gastroenterologist

Dr. Will Bulsiewicz

Gastroenterologist and author of Fiber Fueled. Research on the gut microbiome and its role in chronic disease, immune function, and mental health. Plant-based medicine advocate.

Known For

Fiber FueledGut microbiome researchPlant-based medicine

Canon

Biographies as Substitute Mentors

Canon

Courage Is a Learnable Skill

Canon

Dietary Diversity Builds a Resilient Microbiome

Novel

Environment Shapes Behavior More Than Willpower

Canon

Food Is Epigenetic Information That Signals Your Genes

Novel

The Gut Is a Second Brain — And It Talks to Your First One

Canon

Episodes

#Most Replayed Moment: Are You Really Gluten Intolerant? It Could Be This Instead!Jul 10, 2026 #Fix Your Gut: Improve Your MindApr 28, 2026 #Heal Your Gut, Reduce InflammationJan 12, 2026 #Histamine Intolerance: A Gut Problem in DisguiseJan 6, 2025 #The Four Nutrition Workhorses That Heal Your GutSep 9, 2024 #SIBO: Separating Fact from FictionAug 19, 2024 #How to Restore Your Gut After AntibioticsMay 13, 2024