Hardiness with Dr Paul Taylor How much coffe and tea should I drink to protect my brain? Science has the answers: Wisdom Wednesdays
Mar 17, 2026
They explore a large UK Biobank study on coffee and tea and brain health. You hear about a J-shaped risk curve for coffee and consistent protective links for tea. Discussion covers how caffeine, polyphenols and timing affect neurons, amyloid and sleep. Practical intake and timing tips are offered, including avoiding late-day caffeine.
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Different Risk Patterns For Coffee And Tea
- Moderate coffee shows a J-shaped risk curve where 1–3 cups may be beneficial but >5 cups increases neurodegenerative disease risk.
- Tea consistently lowered risk; >3 cups/day associated with ~17% lower risk across several dementias in UK Biobank data.
Tea May Offset Coffee Risks
- Combining moderate coffee with moderate/high tea reduced neurodegenerative risk; tea may offset some coffee-related risk.
- Researchers propose additive effects because coffee and tea polyphenols act via different molecular pathways.
Different Mechanisms: Caffeine Versus Polyphenols
- Caffeine enhances neuronal resilience and plasticity but excessive intake can flip harms by raising lipids and vascular risk.
- Polyphenols differ: coffee has hydroxycinnamic acids, tea has catechins like EGCG with distinct neuroprotective actions.