The more caffeinated coffee women drink, the less likely they are to develop depression, according to a prospective study in the Archives of Internal Medicine.
Some 50,000 Nurses' Health Study participants without depressive symptoms at baseline were followed for roughly 10 years. During that time, about 5% reported physician-diagnosed depression.
Overall, as self-reported caffeinated coffee consumption increased, the risk for depression decreased. In particular, compared with women who drank 1 cup or less a week, those drinking 2 to 3 cups a day had a 15% lower relative risk for depression, and those drinking 4 or more cups a day had a 20% lower risk. No link was seen between other sources of caffeine and depression, or between decaffeinated coffee and depression.
An editorialist says that the while these and other data may provide reassurance that coffee drinking has "no glaringly deleterious health consequences ... it seems premature to recommend coffee consumption."
Archives of Internal Medicine article (Free abstract)
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