Brain Defenders: Harness the Power of Your Immune Cells to Protect Your Brain for Life
Aug 2026 · Sold by Penguin
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INSTANT NEW YORK TIMES BESTSELLER
From #1 New York Times bestselling author Dr. David Perlmutter comes a groundbreaking guide to the brain’s immune cells—essential to preventing disease and sustaining peak cognitive function and mental health
We’ve been fighting the wrong enemy. For decades, medicine has pointed its weapons at symptoms like memory loss, tremors, headaches, and lethargy, while ignoring the root causes of diseases like Alzheimer’s, Parkinson’s, and major depression. In Brain Defenders, neurologist Dr. David Perlmutter flips the script, exposing the real culprits: malfunctioning microglia, tiny immune cells that, when metabolically hijacked, go rogue and attack the very neurons they’re meant to protect.
With clarity and urgency, Dr. Perlmutter explains how a silent battle rages in the brain. Microglia can become either warriors of protection or agents of destruction—and the outcome depends largely on how we live. In Brain Defenders, you will:
From #1 New York Times bestselling author Dr. David Perlmutter comes a groundbreaking guide to the brain’s immune cells—essential to preventing disease and sustaining peak cognitive function and mental health
We’ve been fighting the wrong enemy. For decades, medicine has pointed its weapons at symptoms like memory loss, tremors, headaches, and lethargy, while ignoring the root causes of diseases like Alzheimer’s, Parkinson’s, and major depression. In Brain Defenders, neurologist Dr. David Perlmutter flips the script, exposing the real culprits: malfunctioning microglia, tiny immune cells that, when metabolically hijacked, go rogue and attack the very neurons they’re meant to protect.
With clarity and urgency, Dr. Perlmutter explains how a silent battle rages in the brain. Microglia can become either warriors of protection or agents of destruction—and the outcome depends largely on how we live. In Brain Defenders, you will:
- Learn the science of immunometabolism and the relationship between energy and your cells
- Understand the overlooked role of inflammation in everything from dementia to long COVID—and why the immune system may be the brain’s greatest threat and hope
- Discover how your lifestyle affects the fate of your microglia and, in turn, your cognitive future
- Uncover the surprising link between metabolic health and brain resilience, and how tools like fasting, sleep, and even oxygen therapy can restore damaged neural networks
- Explore therapeutic interventions—from metformin to lion’s mane mushroom—that support healing and slow neural decline
INSTANT NEW YORK TIMES BESTSELLER
From #1 New York Times bestselling author Dr. David Perlmutter comes a groundbreaking guide to the brain’s immune cells—essential to preventing disease and sustaining peak cognitive function and mental health
We’ve been fighting the wrong enemy. For decades, me...
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About the author
David Perlmutter, MD, is a board-certified neurologist and six-time New York Times bestselling author. He serves on the board of directors and is a fellow of the American Nutrition Association. He serves as a member of the editorial board for the Journal of Alzheimer’s Disease and has published extensively in peer-reviewed scientific journals including Archives of Neurology, Neurosurgery, and the Journal of Applied Nutrition. In addition, he is a frequent lecturer at symposia sponsored by institutions such as the World Bank and IMF, Columbia University, Scripps Research Institute, New York University, and Harvard University and serves as an associate professor at the University of Miami Miller School of Medicine.
David Perlmutter, MD, is a board-certified neurologist and six-time New York Times bestselling author. He serves on the board of directors and is a fellow of the American Nutrition Association. He serves as a member of the editorial board for the Journal of Alzheimer’s Disease and has published e...
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