Researchers tracking more than 130,000 adults over decades found that moderate consumption of caffeinated coffee and tea was linked to slower cognitive decline and reduced dementia risk.
By yourNEWS Media Newsroom
A major long-term study published in JAMA found that moderate daily consumption of caffeinated coffee and tea was associated with a lower risk of dementia and slower cognitive decline over several decades.
The research analyzed data from approximately 131,821 participants enrolled in two large ongoing health studies conducted by researchers from Mass General Brigham and Harvard T.H. Chan School of Public Health.
The study drew from the long-running Nurses’ Health Study, launched in 1976, and the Health Professionals Follow-Up Study, both of which tracked health outcomes and lifestyle habits over many years.
Researchers found the strongest association with improved brain health among individuals who consumed approximately two to three cups of caffeinated coffee daily or one to two cups of caffeinated tea each day.
According to the analysis, moderate caffeine intake was associated with reduced dementia risk regardless of participants’ genetic predisposition to cognitive decline.
The study specifically identified caffeinated beverages as the factor linked to the observed benefits.
Decaffeinated coffee and tea did not demonstrate the same association with reduced dementia risk or slower cognitive deterioration.
Researchers said the findings suggest caffeine itself may play a central role in the observed neuroprotective effects rather than other naturally occurring compounds found in coffee or tea.
The authors cautioned that the study was observational and does not establish direct causation.
They noted that individuals who regularly consume moderate amounts of coffee or tea may also engage in other healthy behaviors that contribute to better cognitive outcomes, including exercise, improved sleep habits, and healthier diets.
Still, the consistency of the findings across multiple large population groups strengthened evidence supporting a meaningful connection between moderate caffeine consumption and long-term brain health.
Researchers also pointed to several possible biological mechanisms that may explain caffeine’s protective effects.
Caffeine blocks adenosine receptors in the brain, a process believed to reduce cellular stress and age-related neurological damage.
Additional research cited in the study suggested caffeine may possess anti-inflammatory properties and improve circulation by helping dilate blood vessels.
The book Coffee, Tea, Chocolate and the Brain described caffeine as a psychostimulant consistently associated with lower risks of neurodegenerative disease.
Separate findings referenced in 2 Weeks to a Younger Brain reported that individuals consuming one to three cups of coffee daily were linked to a substantially lower risk of developing Alzheimer’s disease.
Researchers emphasized, however, that the exact biological pathways involved remain under investigation.
The study also highlighted practical considerations for caffeine use.
Researchers advised limiting caffeine intake to morning or early afternoon hours to avoid sleep disruption, which itself has been associated with increased dementia risk.
They also recommended choosing coffee and tea with minimal added sugar or artificial creamers.
Natural caffeine sources such as high-quality coffee and green tea may provide additional phytonutrients that support cognitive health.
Authors of Nutrition for Brain Health noted that coffee and tea contain natural compounds that may help support memory and neurological function.
The study’s authors stressed that caffeine should not be viewed as a standalone solution for preventing dementia.
Broader lifestyle factors, including nutrition, physical activity, sleep quality, and social engagement, remain central to long-term cognitive health.
In Keep Sharp: Build a Better Brain at Any Age, Sanjay Gupta emphasized the importance of reducing sugar intake and prioritizing whole foods as part of a broader strategy for maintaining brain health with age.
Researchers advised that individuals sensitive to caffeine or those with conditions such as anxiety should tailor consumption accordingly and consult healthcare professionals when necessary.
Source: Natural News
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