# Daily Coffee Consumption Linked to Lower Dementia Risk Long-term study finds two to three cups of caffeinated coffee may support cognitive health. - **Source:** [ScienceDaily – Mind & Brain](https://www.sciencedaily.com/news/mind_brain) - **Published:** 2026-11-07 - **Topic:** [health](https://brifing.si/c/health) - **Original article:** - **On Brifing:** https://brifing.si/s/a7627592-4e9b-4059-bc7c-9260d474af3d ## Long-term Cognitive Study A comprehensive study tracking U.S. adults over 43 years indicates that regular consumption of caffeinated coffee is associated with a significantly lower risk of developing dementia. The research highlights a clear correlation between daily habits and long-term brain health, suggesting that lifestyle choices play a measurable role in aging processes. ## Dementia Rate Comparison Data reveals a stark contrast in dementia incidence between coffee drinkers and non-drinkers. Among those who consumed higher amounts of caffeinated coffee, researchers recorded 141 dementia cases annually per 100,000 people. In contrast, the group that rarely or never drank caffeinated coffee experienced a much higher rate of 330 cases per 100,000. ## Optimal Daily Dosage The strongest associations with reduced dementia risk and improved cognitive function were found in individuals drinking two to three cups of caffeinated coffee daily. Interestingly, consuming amounts beyond this specific range did not appear to provide additional protective benefits, suggesting that moderate intake is the most effective approach for brain health. ## Caffeine's Potential Role The study suggests caffeine may be a key factor, as decaffeinated coffee did not show the same protective benefits as its caffeinated counterpart. While caffeine is a well-known stimulant for alertness, these findings raise new questions about its long-term impact on the central nervous system and its potential role in neuroprotection. ## Subjective Cognitive Decline Beyond diagnosed dementia, researchers examined subjective cognitive decline, where individuals notice their own memory or thinking difficulties. Only 7.8% of high-caffeinated coffee consumers reported such issues, compared to 9.5% of those who avoided it. This indicates that coffee consumption may contribute to a broader sense of healthier cognitive aging over time. ## Genetic Risk Independence The observed benefits remained consistent regardless of a participant's genetic predisposition to dementia. Even among individuals with inherited DNA variations that typically increase vulnerability to brain disorders, the association between coffee consumption and better cognitive outcomes persisted. This suggests that lifestyle habits may partially mitigate the influence of inherited genetic risk factors. ## Tea Consumption Patterns Tea drinkers also showed improved cognitive outcomes, with the most favorable results linked to one to two cups per day. Unlike the coffee findings, the study did not distinguish between caffeinated and noncaffeinated tea, making it unclear if caffeine is the primary driver of the benefits observed among tea consumers. ## Correlation Versus Causation While these findings are encouraging, they demonstrate an association rather than proving that coffee directly prevents dementia. Other lifestyle differences between coffee drinkers and non-drinkers could influence these results. Further research is required to determine if these beverages exert a direct biological effect on the brain's long-term health and function. ## Sources covering this story - https://www.sciencedaily.com/releases/2026/11/261105224550.htm — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._