David PerlmutterPresident,, Perlmutter Health Center · Board-Certified Neurologist | Functional Medicine Pioneer | #1 New York Times Best-Selling Author | International Speaker | Host of The Empowering Neurologist Podcast

The Gut-Brain Connection You Need to Understand

28 Aug 2026 · 1 min

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In this brief monologue, Dr. David Perlmutter emphasizes that the gut‑brain connection profoundly affects the brain’s immune system, which he describes as an upstream driver of neurodegenerative diseases such as Alzheimer’s and Parkinson’s. He notes that emerging microbiome fingerprinting techniques can detect early risk for these conditions, and he stresses that diet is the single most powerful factor shaping the gut microbiome.

Chapters

There's one important thing I wish everybody knew about the gut-brain connection. This connection is incredibly influential as it relates to the brain's immune system. Why does that matter? It matters because the brain's immune system is really upstream of every neurodegenerative condition, including important ones like Alzheimer's and Parkinson's disease. That's why we're now seeing actual fingerprinting done of the gut microbiome that can help us identify early on risk for things like Alzheimer's and Parkinson's disease. So it really matters. And what's the most important influence on the makeup of your gut microbiome? The foods that you eat.