A long-term analysis published in JAMA reports that moderate daily consumption of caffeinated coffee or tea is associated with a reduced risk of dementia and slower cognitive decline, though researchers stress the findings do not prove cause and effect.
By yourNEWS Media Newsroom
A comprehensive, decades-spanning study published in the Journal of the American Medical Association (JAMA) has found that moderate intake of caffeinated coffee or tea is associated with a lower risk of developing dementia and with slower rates of cognitive decline.
The research, conducted by investigators affiliated with Mass General Brigham, Harvard T.H. Chan School of Public Health and the Broad Institute, analyzed health and dietary data from 131,821 participants enrolled in two long-running U.S. cohort studies. Participants were followed for up to 43 years, allowing researchers to examine beverage consumption patterns across adulthood and compare them with long-term cognitive outcomes.
During the study period, 11,033 participants were diagnosed with dementia. After adjusting for demographic, lifestyle and health-related factors, researchers observed that individuals who consumed the highest amounts of caffeinated coffee had an 18% lower risk of dementia compared with those who consumed little or none.
The data revealed what researchers described as a nonlinear dose-response pattern. For caffeinated coffee, the strongest association with lower dementia risk appeared at two to three cups per day. For tea, the association peaked at one to two cups daily. Higher consumption did not correspond with additional protective benefit.
A notable distinction emerged between caffeinated and decaffeinated beverages. Decaffeinated coffee showed no association with reduced dementia risk or improved cognitive performance. That contrast suggests caffeine itself is likely the principal compound linked to the observed effect.
Because the study is observational, it cannot establish direct causation. However, researchers and neurologists point to several biologically plausible mechanisms that may explain the association.
Caffeine acts as an antagonist to adenosine receptors in the brain. Laboratory studies have shown that blocking specific adenosine receptors may reduce accumulation of amyloid-beta, a protein associated with plaque formation in Alzheimer’s disease. In addition, caffeine has been linked to improved vascular function. Enhanced blood flow and better cardiovascular health may reduce the risk of vascular dementia, which results from impaired cerebral circulation.
Caffeine consumption has also been associated with improved insulin sensitivity. Metabolic disorders such as obesity and type 2 diabetes are recognized risk factors for cognitive decline, and improved glucose regulation may indirectly support brain health.
Despite these findings, researchers caution against interpreting coffee or tea as a preventive treatment. The association observed in the study is modest, and other lifestyle factors likely play a substantial role. Individuals who drink moderate amounts of caffeinated beverages may differ in other health behaviors or genetic predispositions that contribute to cognitive resilience.
Medical professionals also note that caffeine is not appropriate for everyone. Individuals with anxiety disorders, sleep disturbances, cardiac arrhythmias or certain migraine conditions may need to limit intake. The study does not suggest increasing consumption beyond moderate levels, and higher amounts did not demonstrate additional benefit.
Experts emphasize that dementia prevention remains multifactorial. Regular physical activity, balanced nutrition, cognitive engagement and social connection continue to be foundational components of brain health.
“Cognitive resilience is the ability to maintain mental function and adapt effectively to stress,” said BrightU.AI’s Enoch. “It relies on biological processes like the production of new neurons, which support mental health. This resilience can be strengthened through activities like exercise, learning and social interaction.”
The findings add to a growing body of research exploring modifiable risk factors for dementia. While no single habit guarantees protection, the study suggests that for individuals who tolerate caffeine well, maintaining a moderate routine of two to three cups of coffee or one to two cups of tea daily may be associated with long-term cognitive benefits.
Researchers stress that such habits should be viewed as one element within a broader framework of healthy aging rather than a standalone intervention.
Watch and discover the heathy benefits of caffeine.
This video is from the Holistic Herbalist channel on Brighteon.com.
Source: Natural News