Consumption of low-fat dairy products -- skim milk, yogurt, ice cream and cheese -- correlates with a lower risk of developing diabetes, according to a study of 40,000 middle-aged men by the Harvard School of Public Health, as reported in the Archives of Internal Medicine. The link might be due to whey proteins or magnesium, which aid insulin in regulating blood sugar. Sour cream, whole milk and cream cheese consumption doesn't have the same correlation, according to the study.

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