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Diabetes Health Center

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Milk May Help Keep Diabetes Away

Study: 2 to 3 Cups of Low-Fat Dairy Lowers Diabetes Risk by 20%
WebMD Health News

May 10, 2005 --There is mounting evidence that milk can lower your risk of developing type 2 diabetes.

Men who drank 2 to 3 cups of low-fat or nonfat milk a day were found to be 20% less likely to develop type 2 diabetes in a study by researchers from Massachusetts General Hospital and the Harvard School of Public Health in Boston.

The study is the first to find a direct protective benefit for dairy against diabetes. But Harvard nutrition researcher Frank Hu, MD, PhD, says it is too soon to tell people at high risk for type 2 diabetes to eat more dairy.

"I don't think it is a good idea at this point to recommend high dairy consumption as a public health strategy to prevent diabetes," he says. "While this research is definitely intriguing, the public health implications are not yet clear."

More Servings, Lower Risk

About 18 million Americans have type 2 diabetes and 41 million more are considered to be at very high risk for developing the disease. Nine out of 10 cases of type 2 diabetes are believed to be caused by lifestyle factors such as being overweight, getting no exercise, and eating a poor diet.

The Harvard School of Public Health study included information obtained from more than 41,000 men participating in an ongoing nutrition and health investigation.

None of the men had diabetes when they enrolled in the study, but 1,243 cases were diagnosed during 12 years of follow-up.

"Each serving-per-day increase in total dairy intake was associated with a 9% lower risk for type 2 diabetes," researcher Hyon K. Choi, MD, notes in a news release.

The reduction in diabetes risk was limited to low-fat and nonfat dairy products, however. There was no decrease in men who drank whole milk.

The protection was seen even after accounting for known diabetes risk factors, such as body weight and exercise. Lifestyle differences between the men who drank milk and those who didn't could help explain the findings, says Hu.

"It is possible that people who drink a lot of nonfat milk or eat other low-fat dairy products would have healthier lifestyles overall," he says.

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