A large-scale study published in JAMA found that moderate daily consumption of caffeinated coffee or tea is associated with a lower risk of dementia and slower cognitive decline over several decades. According to the analysis, which drew on data from approximately 131,821 participants, the greatest brain-health benefits were observed among those who consumed 2 to 3 cups of caffeinated coffee per day or 1 to 2 cups of caffeinated tea per day. [1] The study was led by researchers from Mass General Brigham and Harvard T.H. Chan School of Public Health, who tracked participants from two long-running cohorts: the Nurses’ Health Study, which began in 1976, and the Health Professionals Follow-Up Study. [2]
The association between caffeine intake and reduced dementia risk held across individuals with varying genetic predispositions to the condition, the report stated. Researchers analyzed decades of health outcomes and cognitive assessments. The findings suggest that regular, moderate caffeine consumption may help preserve brain function as people age. [3]
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