A study in Nutrition, Metabolism & Cardiovascular Diseases revealed that type 1 diabetes patients who drank three to four cups of coffee daily had a 1.8-fold increased metabolic syndrome risk, while those who drank five or more cups per day had a 2.1-fold increased risk, compared with non-coffee drinkers. Finnish researchers used a cohort of 1,040 diabetes patients and also found that those who drank one or more cups of coffee daily had up to a 2.8-fold higher risk of developing hypertension.
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