Caffeine consumption was associated with a 36 percent reduction in the risk of incident dementia over 10 years of follow-up in a group of older women, reveals study.
This level is equivalent to two to three cups of coffee per day, five to six cups of black tea or seven to eight cans of cola. Study's lead author Ira Driscoll said, "The mounting evidence of caffeine consumption as a potentially protective factor against cognitive impairment is exciting given that caffeine is also an easily modifiable dietary factor with very few contraindications." "What is unique about this study is that we had an unprecedented opportunity to examine the relationships between caffeine intake and dementia incidence in a large and well-defined, prospectively-studied cohort of women," Driscoll added.
Driscoll and her team used data from 6,467 community-dwelling, postmenopausal women aged 65 and older who reported some level of caffeine consumption. Intake was estimated from questions about coffee, tea, and cola beverage intake, including frequency and serving size. In 10 years or less of follow-up with annual assessments of cognitive function, 388 of these women received a diagnosis of probable dementia or some form of global cognitive impairment.