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Coffee lowers risk of dementia, study says

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A new research has found that older women who consume more than 261 mg of caffeine per day are at a lower risk of dementia.

The study says that this amount of caffeine 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. The study found that among a group of older women, self-reported caffeine consumption was associated with a 36 per cent reduction in the risk of incident dementia over 10 years of follow-up.

Previous studies have also established to a certain degree that caffeine consumption has potential protective effect against cognitive impairment and the latest study’s finding sits in line with this. Further, because caffeine is available through diet, modification according to the needs is possible and this is an exciting aspect, researchers say.

The study offers an unprecedented opportunity to examine the relationships between caffeine intake and dementia incidence in a large and well-defined, prospectively studied cohort of women, researchers said. For the study, scientists 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. Those who consumed above the median amount of caffeine from this group (with an average intake of 261 mg per day) were diagnosed at a lower rate than those who fell below the median (with an average intake of 64 mg per day).

The researchers adjusted for risk factors such as hormone therapy, age, race, education, body mass index, sleep quality, depression, hypertension, prior cardiovascular disease, diabetes, smoking and alcohol consumption.

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