Moderate daily consumption of coffee or tea may reduce the risk of dementia and slow cognitive decline, a study conducted by Mass General Brigham and Harvard University shows.

An observational study conducted by Mass General Brigham and Harvard University has shown that moderate daily consumption of coffee or tea is associated with a lower risk of dementia and a slower cognitive decline.

Analyzing data from over 130,000 participants over a period of up to 43 years, researchers found that those who consumed moderate caffeine, equivalent to two to three cups of coffee or one to two cups of tea per day, had a risk of dementia up to 18% lower. Additionally, coffee consumers reported less frequent symptoms of subjective cognitive decline.

The study suggests that bioactive compounds in coffee and tea, such as caffeine and polyphenols, may have neuroprotective effects. However, researchers emphasize that the study cannot demonstrate a causal relationship and that protecting cognitive functions depends on multiple factors.

Preventive interventions are essential, considering that available treatments offer limited benefits after the onset of symptoms.