Study Links Coffee Consumption to Lower Dementia Risk

A long-term study suggests that moderate coffee and tea consumption may help protect brain health and reduce the risk of dementia, according to a report highlighted by The New York Times.

Researchers tracked more than 130,000 people for up to 43 years to examine how daily beverage habits affect cognitive health later in life. The results showed that people who drank two to three cups of coffee per day, or one to two cups of tea, had a lower risk of developing dementia, including Alzheimer’s disease.

The protective effect appeared regardless of a participant’s genetic risk factors, suggesting lifestyle choices may still play a role even for those with a family history of dementia.

However, the benefit came with an important distinction: only caffeinated beverages showed the protective link. The study found no similar association with decaffeinated coffee, leading researchers to suspect that caffeine itself—or compounds associated with caffeinated drinks—may contribute to the reduced risk.

Scientists say caffeine may help protect the brain by reducing inflammation, improving blood flow, and supporting the removal of harmful proteins linked to Alzheimer’s disease.

While the findings are promising, researchers caution that coffee and tea are not guaranteed to prevent disease. Brain health still depends on a combination of factors, including diet, physical activity, sleep quality, and cardiovascular health.

Still, for many coffee drinkers, the study offers encouraging news: that daily cup of caffeinated coffee may provide more than just a morning energy boost—it could also support long-term brain health.