Published on: September 30, 2016
by Sue Scheible for The Patriot Ledger:
Higher caffeine intake in women is associated with reduced odds of developing dementia or cognitive impairment, according to the results of a new study published in The Journals of Gerontology, Series A – Biological Sciences and Medical Sciences.
Among a group of older women, self-reported caffeine consumption of more than 261 mg per day was associated with a 36 percent reduction in the risk of incident dementia over 10 years of follow-up. This level is equivalent to two to three 8-oz cups of coffee per day, five to six 8-oz cups of black tea, or seven to eight 12-ounce cans of cola.
“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,” said Ira Driscoll, PhD, the study’s lead author and a professor of psychology at the University of Wisconsin-Milwaukee.
“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.”
The findings come from participants in the Women’s Health Initiative Memory Study, which is funded by the National Heart, Lung, and Blood Institute. Driscoll and her research colleagues 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.
“While we can’t make a direct link between higher caffeine consumption and lower incidence of cognitive impairment and dementia, with further study, we can better quantify its relationship with cognitive health outcomes,” Driscoll said.
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