US Edition
Caffeinated beverages may help protect the brain, study says
A US study of 131,000 health professionals found 2-3 cups of caffeinated coffee or 1-2 cups of tea daily linked to 18% and 14% lower dementia risk, respectively.
- February 9, 2026, researchers found that moderate caffeinated coffee and tea intake from over 130,000 participants was associated with a lower dementia risk, according to a study published in JAMA.
- Researchers analysed repeated dietary data from food-frequency questionnaires every 2–4 years across NHS and HPFS, finding caffeine and polyphenols may reduce neuroinflammation and oxidative stress.
- Over follow-up of up to 43 years, 11,033 participants with dementia were identified, and NHS objective cognitive testing showed small improvements in TICS and global cognition scores.
- The authors cautioned the analysis was observational and not a randomized trial, decaffeinated coffee showed no dementia risk reduction, and generalizability is limited by predominantly White health professionals and dementia classification from death records and medical diagnoses.
- Clinicians were urged to individualize counseling and emphasize broader prevention—exercise, vascular risk control, sleep, diet—rather than prescribing caffeine, for those who already drink and tolerate it, Zhang said.
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165 Articles
Coffee or Tea? One May Be Better at Preventing Dementia, New Study Says
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Risk down by 18% thanks mainly to caffeine (present also in tea): the details in a wide research appeared on Monday on the website of the magazine "Jama"
Drinking coffee every day could reduce the risk of dementia, according to a large Harvard study, but probably only with caffeine. Researchers also found an optimal amount.
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