A Harvard-led study published in JAMA found that moderate coffee and tea consumption (2-3 cups of coffee or 3-5 cups of tea daily) is linked to a 28% lower risk of dementia and a 32% lower risk of stroke, with the strongest protection seen when combining both beverages (4-6 cups total per day). The neuroprotective benefits come from caffeine and bioactive compounds like phenolics, polyphenols and flavonoids, which reduce oxidative stress, inflammation and amyloid-beta buildup – key contributors to dementia. Decaffeinated coffee did not show the same benefits, suggesting caffeine plays a critical role, while tea (especially green and black varieties) provides…

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