The Gut-Brain Connection: Why Your Mental Health Starts in the Microbiome

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The connection between mental health and metabolic health is far deeper than once believed, with growing evidence showing a powerful, bidirectional relationship. Inflammation, poor diet, and gut dysfunction are now recognized as key drivers of both physical and psychological illness—often hiding in plain sight. By addressing root causes such as blood sugar imbalances, nutritional deficiencies, and microbiome disruption, many chronic mental health conditions can improve or even resolve. This emerging science challenges the traditional separation of mind and body, pointing instead to an integrated approach where healing the body becomes essential for healing the brain. Recognizing this link is crucial in shifting the future of mental health care.

In this episode, I discuss, along with Dr. Chris Palmer and Dr. Shebani Sethi, why our diet is so closely related to the state of our mental health.

Dr. Chris Palmer is a psychiatrist and researcher working at the interface of metabolism and mental health. He is the Director of the Department of Postgraduate and Continuing Education at McLean Hospital and an Assistant Professor of Psychiatry at Harvard Medical School. For over 25 years, he has held leadership roles in psychiatric education, conducted research, and worked with people who have treatment-resistant mental illnesses. He has been pioneering the use of the medical ketogenic diet in the treatment of psychiatric disorders - conducting research in this area, treating patients, writing, and speaking around the world on this topic. More broadly, he is interested in the roles of metabolism and metabolic interventions on brain health.

Dr. Shebani Sethi is a double board-certified physician in Obesity Medicine and Psychiatry. She is the Founding Director of Stanford University’s Metabolic Psychiatry program and Silicon Valley Metabolic Psychiatry, a new center in the San Francisco Bay Area focused on optimizing brain health by integrating low carb nutrition, comprehensive psychiatric care, and treatment of obesity with associated metabolic disease.

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Full-length episodes can be found here:

The Hidden Connection Between Gut Health & Mental Health That Therapy and Drugs Cannot Fix

A Harvard Psychiatrist Rethinks Mental Health As A Metabolic Disease

How Does Ultra-Processed Food Affect Our Mental Health?

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