
Wild Health Podcast 490 | Dr. Tommy Wood | Practical Approaches to Brain Health Across the Lifespan
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Oct 1, 2025 Dr. Tommy Wood is a physician-scientist and professor focused on brain development and recovery. In the discussion, he explores how genetics, exercise, and nutrition impact cognitive health throughout life. Dr. Wood emphasizes the significance of neonatal brain injury and innovative therapies, like the neuroprotective components of breast milk. He shares practical strategies for stimulating brain health through diverse activities and the value of biomarkers in guiding lifestyle changes. Notably, he reassures that APOE4 may amplify risks but isn't an inevitable fate.
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Stimulus Is The Core Driver Of Brain Change
- The brain's primary driver of change is stimulus, much like muscle needs resistance to grow.
- Supporting processes (sleep, nutrition, stress reduction) let the brain adapt and maintain those changes.
Lifelong Stimulation Shapes Cognitive Peak
- Lifelong cognitive capacity tracks cumulative stimulation across education, work, and hobbies.
- Sensory loss and low-complexity jobs reduce stimulus and raise dementia risk.
Home Environment Outweighs Many Neonatal Risks
- Babies born preterm face higher long-term cognitive and dementia risk proportional to prematurity.
- Tommy Wood found the home environment (parental education) outweighed many neonatal hospital factors for cognitive outcome.

