Lower Blood Sugar with Healthy Fats Says New Study

Start eating more nuts, seeds, fish and vegetable oils. Researchers say it could lower your blood sugar levels.

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Getting more healthy fats into your diet such as nuts, seeds and vegetable oils, while at the same time keeping a check on animal fats and refined carbohydrates, can help prevent or control type 2 diabetes, new research suggests.

The study found that dietary changes can lower blood sugar levels while helping to improve insulin sensitivity.

Maintaining a diet rich in monounsaturated or polyunsaturated fat rather than meals which are high in carbohydrates or saturated fat showed improvements in blood sugar control.

“The world faces an epidemic of insulin resistance and diabetes. Our findings support preventing and treating these diseases by eating more fat-rich foods like walnuts, sunflower seeds, soybeans, flaxseed, fish and other vegetable oils and spreads, in place of refined grains, starches, sugars and animal fats,” said study co-leader Dr. Dariush Mozaffarian. He is dean of the Friedman School of Nutrition Science and Policy at Tufts University in Boston.

“This is a positive message for the public. Don’t fear healthy fats,” Mozaffarian said in a university news release.

The study analyzed results of 102 trials including 4,660 adults to evaluate in what ways different types of dietary fat and carbohydrates affected certain key risk factors for type 2 diabetes.

Published July 19 in PLOS Medicine, the analysis involved studies that provided participants with meals with varying amounts of saturated, monounsaturated and polyunsaturated fats and carbohydrates.

Researchers then assessed how these dietary differences affected measures of metabolic health, including blood sugar and insulin levels, as well insulin sensitivity and production.

Maintaining a diet rich in monounsaturated or polyunsaturated fat rather than meals which are high in carbohydrates or saturated fat showed improvements in blood sugar control, the researchers found.

Previous studies have estimated that each 0.1 percent drop in HbA1C — an indicator of long-term blood sugar control — could reduce the incidence of type 2 diabetes by 22 percent and heart disease by 6.8 percent, the researchers said.

“Among different fats, the most consistent benefits were seen for increasing polyunsaturated fats, in place of either carbohydrates or saturated fat,” said the study’s first author, Fumiaki Imamura, of the Medical Research Council Epidemiology Unit at the University of Cambridge in England.

The study authors said their findings should help inform doctors and patients about the effects of diet on metabolic health and the risk for type 2 diabetes.

“Until now, our understanding of how dietary fats and carbohydrates influence glucose, insulin and related risk factors has been based on individual studies with inconsistent findings,” Imamura said. “By combining results from more than 100 trials, we provide the strongest evidence to date on how major nutrients alter these risks.”

More information

The U.S. National Institute of Diabetes and Digestive and Kidney Diseases provides more information on how to prevent type 2 diabetes.


 

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