How Coffee Affects Blood Sugar and Diabetes



Type 2 diabetes is a massive health problem worldwide. About 29 million people, or 9% of all US adults, had type 2 diabetes in the year 2012 (1). Interestingly, long-term studies have linked coffee drinking with a reduced risk of type 2 diabetes (2, 3).

Yet, oddly enough, many short-term studies have shown that coffee and caffeine can raise blood sugar and insulin levels (4, 5, 6). Why this happens is not fully known, but there are several theories.

This article examines the short-term and long-term effects of coffee on blood sugar and diabetes.

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