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

August 12, 2026

12 Aug 2026 · 1 min

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In this monologue, the speaker argues that metabolic dysfunction that begins in a person’s 30s‑50s plants the seeds for Alzheimer’s disease that can manifest as early as the 40s. He explains that compromised blood‑sugar regulation, impaired insulin activity, and excess body weight during mid‑life trigger brain degeneration, leading to memory loss and executive‑function decline. Consequently, he stresses a preventive strategy: intervene early—ideally in the 30s and early 40s—to maintain optimal metabolic health (stable glucose, functional insulin, normal weight) as a means to keep Alzheimer’s at bay.

Chapters

We are building a generation that will get Alzheimer's in its 40s. The reality is that that's when the metabolic seeds for Alzheimer's disease are sown. When we become metabolically compromised in our 40s and 50s, those are the earliest issues that relate to what causes the brain to degenerate, that ultimately causes the memory failure, the loss of executive function, etc., all of the clinical manifestations of Alzheimer's disease. That's well along in the continuum. We've got to intervene in your health when you're in your 30s and 40s to keep you metabolically intact, keep your blood sugar where it needs to be, your insulin functionality where it needs to be, and your body weight normal as well. That's how we keep Alzheimer's at bay.