Caffeinated Coffee May Lower Dementia Risk, New Study Finds

Pour yourself a cup for this one: A massive study of over 130,000 people suggests that regular caffeinated coffee might be more than just a morning ritual—it could be a shield against dementia. Published in JAMA, the research found that those drinking 2-3 cups daily had an 18% lower risk of developing dementia compared to non-drinkers. The benefits weren’t just statistical fluff either—coffee drinkers also showed better performance on cognitive tests and lower rates of “subjective cognitive decline,” a subtle but telling sign of brain health.

The study’s strength lies in its scale and longevity. Tracking data from the Nurses’ Health Study and Health Professionals Follow-up Study—both decades-long—the researchers found that even modest coffee consumption (1-2 cups) correlated with protective effects. Tea drinkers saw similar results, but decaf didn’t, hinting that caffeine is the active ingredient. “It’s not just about the cup,” says lead author Daniel Wang. “It’s about how caffeine interacts with brain chemistry to slow cognitive decline.”

But don’t reach for the espresso machine just yet. The study’s observational nature means it can’t prove causation, and Wang warns that the effect size is small. “Coffee is one piece of the puzzle,” he says. “Sleep, exercise, and social engagement matter just as much.” Still, the findings align with other research showing coffee’s potential to mitigate dementia risk—especially in people with hypertension.

Here’s what to take away: Caffeine may help protect brain cells from damage, but it’s not a magic bullet. Prioritize quality sleep, stay socially active, and pair coffee with a healthy lifestyle. And if you’re already a regular, keep sipping—your brain might be thanking you.