Per Mass General Brigham Communications, in news.harvard.edu “Drinking 2-3 cups of coffee a day tied to lower dementia risk.”
“Evidence from a study of more than 130,000 people suggests that two to three cups of coffee a day can reduce dementia risk and slow cognitive decline.
The research — published in JAMA and led by investigators from Mass General Brigham, Harvard T.H. Chan School of Public Health, and the Broad Institute of MIT and Harvard — analyzed data from the Nurses’ Health Study and Health Professionals Follow-Up Study.
Coffee and tea contain bioactive ingredients like polyphenols and caffeine, which have emerged as possible neuroprotective factors that reduce inflammation and cellular damage while protecting against cognitive decline. Though promising, findings about the relationship between coffee and dementia have been inconsistent, as studies have had limited follow-up and insufficient detail to capture long-term intake patterns, differences by beverage type, or the full continuum of outcomes — from early subjective cognitive decline to clinically diagnosed dementia.
Data from Nurses’ Health Study and Health Professionals Follow-Up Study help to overcome these challenges. Participants repeated assessments of diet, dementia, subjective cognitive decline, and objective cognitive function, and were followed for up to 43 years. Researchers compared how caffeinated coffee, tea, and decaffeinated coffee influenced dementia risk and cognitive health of each participant.
Of the 131,821 participants, 11,033 developed dementia. Both male and female participants with the highest intake of caffeinated coffee had an 18 percent lower risk of dementia compared with those who reported little or no caffeinated coffee consumption. Caffeinated coffee drinkers also had lower prevalence of subjective cognitive decline (7.8 percent versus 9.5 percent). By some measurements, those who drank caffeinated coffee also showed better performance on objective tests of overall cognitive function.
Higher tea intake showed similar results, while decaffeinated coffee did not — suggesting that caffeine may be the active factor producing these neuroprotective results, though further research is needed to validate the responsible factors and mechanisms.
The cognitive benefits were most pronounced in participants who consumed two to three cups of caffeinated coffee or one to two cups of tea daily. Contrary to several previous studies, higher caffeine intake did not yield negative effects — instead, it provided similar neuroprotective benefits to the optimal dosage."
Take home points
- Prevention of dementiais important and as Americans usually start their mornings with some caffeine, this study is encouraging. However, we are not clear as to what specific coffee or teas would be better(Columbian, Americano, Expresso, Darjeeling, Matcha).
- Chose caffeinated coffee over decaffeinated when you can.
- Coffee has other health benefits also which you can get in at the same time!
- Try to avoid caffeine intake in the evening and night time as it can affect your sleep
- Remember…there are other things you can do to keep your mind sharp also such as exercise, playing games, eating healthy, etc.
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