What if Alzheimer’s doesn’t begin when you start forgetting names or struggling with memory but decades earlier, when subtle changes are happening in your metabolism, inflammation, and brain?
With Alzheimer’s in my own family, this conversation with Dr. David Perlmutter felt especially personal. Dr. Perlmutter is a board-certified neurologist, six-time New York Times bestselling author, and one of the leading voices challenging how we think about brain health and cognitive decline. His new book, Brain Defenders, explores emerging research around microglia — the immune cells of the brain — and why they may hold an important key to protecting our brains as we age.
We dive into why Dr. Perlmutter believes we need to start thinking about Alzheimer’s prevention in our 30s and 40s, the surprising connection between metabolic health and the brain, and how our everyday choices may influence whether our brain’s immune cells protect us or work against us.
We also get into the role of ultra-processed foods, blood sugar and insulin, the gut microbiome, environmental toxins, sleep, inflammation, mitochondria, vitamin D, and some of the biomarkers Dr. Perlmutter believes are worth knowing. And for women, we explore what happens to the brain during menopause, the latest conversation around estrogen and hormone replacement therapy, and why women face a greater risk of Alzheimer’s.
Dr. Perlmutter also shares fascinating new research that could change how we think about Alzheimer’s, Parkinson’s, MS, traumatic brain injury, and other neurological conditions — including why the future of brain health may look very different from the traditional “wait for symptoms, then treat” approach.
This episode left me feeling incredibly hopeful about how much influence we may actually have over the future of our brains. If you’ve ever worried about your memory, your family history, or simply want to stay sharp and resilient as you age, this is a conversation you don’t want to miss.
Key Moments You'll Love ✨ :
🧠 [1:50] Only 6.8% of Americans Are Metabolically Healthy — and Your Brain Pays the Price
🍟 [7:31] One Handful of Chips a Day Raises Your Alzheimer's Risk by 13%
💊 [9:18] The Alzheimer's Drugs the FDA Approved That Don't Work — and Kill
🦠 [12:47] You're Eating for Billions — How Your Gut Microbiome Drives Brain Health
🌱 [30:01] 70% of Alzheimer's Patients Stopped Declining With Just Diet and Exercise
🧬 [31:16] One Brain Scan That Shows If Your Microglia Have Turned Against You
💡 [35:51] Flashing Light 40 Times Per Second — MIT's Alzheimer's Breakthrough
😴 [46:32] Bad Sleep Leaves Toxic Proteins in Your Brain Overnight
☀️ [47:57] Why Vitamin D Deficiency Is a Massive Alzheimer's Risk Factor
📊 [50:44] The Blood Test That Predicts Alzheimer's Before Symptoms Appear
🩸 [52:32] Get a Fasting Insulin Test — Not Just a Blood Sugar Test
🦠 [55:41] Long Covid Shifted Microglia in 12% of the Planet — Here's What Helps
LINKS
Dr. David Perlmutter’s website:https://drperlmutter.com/
Dr. David Perlmutter on Instagram @davidperlmutter
Brain Defenders: Harness the Power of Your Immune Cells to Protect Your Brain for Life book on Amazon: https://amzn.to/4glvlcH
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