New research suggests that moderate daily intake of caffeinated coffee or tea may be linked to better long-term brain health.
Drinking caffeinated coffee or tea each day may be associated with a reduced risk of developing dementia later in life, according to recent research based on long-term population data. The findings indicate that people who regularly consumed these beverages showed better cognitive outcomes over time.
The strongest association was seen among individuals who drank two to three cups of coffee per day or one to two cups of tea daily. Midlife coffee drinkers showed about an 18% lower risk of dementia, while tea drinkers had a 14% lower risk. These benefits were not observed in people who consumed decaffeinated versions.
The study analyzed data from more than 130,000 participants tracked over many years, using repeated dietary assessments. Researchers noted that while the link is significant, the study was observational. This means it shows an association but cannot confirm that caffeine directly prevents dementia.
Experts caution against increasing caffeine intake solely for brain protection. Other factors may contribute to the observed benefits, including lifestyle habits, diet quality, or compounds present in coffee and tea that are reduced during decaffeination.
Coffee and tea contain a range of bioactive compounds that may influence inflammation, blood pressure, metabolism, and oxidative stress. However, specialists stress that these beverages should not replace proven brain-healthy habits such as regular physical activity, good sleep, not smoking, managing chronic conditions, staying socially active, and maintaining a balanced, plant-focused diet.
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