What to know about a new study on coffee, tea, caffeine and dementia risk

February 11, 2026

TL;DR

A study analyzed data from 131,821 people over 43 years, tracking coffee, tea, and cognitive health.
People who drank the most caffeinated coffee showed an 18% lower risk of dementia compared to those who drank little or none.
Drinking caffeinated tea was also associated with a lower dementia risk.
Decaffeinated coffee intake was not significantly associated with dementia risk.
Experts emphasize that the study shows an association, not cause and effect, and recommend caution with interpreting the results.
Other factors like exercise, diet, weight management, and addressing hearing loss are recommended for dementia prevention.

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