Podcast summary
653: A neurologist's honest take on Alzheimer's blood tests | Richard Isaacson, MD
Alzheimer’s prevention is medical, not mystical
The episode reframes Alzheimer’s as a heterogeneous medical condition affecting the brain end-organ, with unknown root causes but actionable risk reduction; lifestyle comes first, then careful baseline screening.
One biomarker test can mislead
Blood-based tau/amyloid testing is highly sensitive to handling, platform, timing, and infection-related inflammation; results need verification via panels and repeat sampling, not single “magic” numbers.
Wearables can estimate cognitive decline risk
Device-derived sleep metrics (deep/REM) plus physical activity can predict cognitive decline without cognitive testing, making sleep quality and stability the highest-leverage “baseline” to track and improve.
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