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Scientific research indicates that moderate coffee consumption is statistically significantly associated with a reduced risk of developing type 2 diabetes1-19. Moderate coffee consumption is typically defined as 3-5 cups per day, based on the European Food Safety Authority’s review of caffeine safety20.

The association has been studied in several different populations and the available research suggests that a moderate intake of coffee is associated with a lower risk of developing type 2 diabetes, compared to consuming none or less than 2 cups per day2,15-18. The association is seen with both caffeinated and decaffeinated coffee2,8,17.

Currently, a plausible mechanism to explain this association is still lacking. There is no clear consensus on a potential mechanism, although observations of beneficial effects of coffee consumption on some markers of subclinical inflammation are interesting21.

The association between coffee/caffeine consumption and diabetes is specific to type 2 diabetes only.

The content in this Topic Overview was last edited in October 2018. Papers in the Latest Research section and further resources are added regularly.

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