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Researchers studied the effect of coffee drinking on the risk for rosacea, a chronic skin disease that causes facial redness in about 5 percent of the population.
The scientists used data on 82,737 women participating in a large health study between 1991 and 2005. The study collected information on coffee consumption every four years and documented 4,945 cases of clinician-diagnosed rosacea over the period.
Women who drank four or more cups of caffeinated coffee a day had a 23% lower risk of the skin disorder than those who drank less than a cup a month.