There has been mixed evidence as to whether coffee can help to stave off dementia. Researchers from the University of Helsinki studied 2,606 twins asking them about their coffee-drinking habits and other health and lifestyle factors when they were around 50, and testing their cognition when they were around 74. The study found that each year of increasing age was associated with a decline in thinking abilities. However, coffee consumption was found not to be protective against cognitive decline. Heart disease, diabetes and dissatisfaction with life were all associated with an increased risk of dementia.
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