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Current Position:Home » News » Special Foods » Health Foods » Topic

2 ounces of walnuts a day boosts heart health

Zoom in font  Zoom out font Published: 2013-06-21  Views: 18
Core Tip: A new study published in the Journal of the American College of Nutrition solidifies the importance nutrient-rich walnuts play in healthy diets.
A new study published in the Journal of the American College of Nutrition solidifies the importance nutrient-rich walnuts play in healthy diets. The study found eating about 2 ounces of walnuts a day helps protect against heart disease without weight gain, according to a new study published in the Journal of the American College of Nutrition.

Researchers at the Yale-Griffin Prevention Research Center investigated the health effects of daily walnut consumption by a group of adults at risk for developing diabetes or heart disease. Results are consistent with findings of a prior study conducted by the team that found a significant improvement in blood vessel function among people with diabetes who consumed two ounces of walnuts per day for eight weeks.

"Our work to date has shown clear benefits of adding walnuts to the diet for people with, and at risk, for diabetes," said Dr. David L. Katz, director of the Yale-Griffin Prevention Research Center, and principal investigator of the study. "To some extent, this is because walnuts are concentrated in a variety of health-promoting nutrients, including omega-3 fat. The results are also probably due to the fact that eating more walnuts, which tend to help us feel and stay full, means eating less of other, less nutritious foods so there are benefits both from what is added to the diet, and what is bumped out."

Adults who took part in the current study were overweight, had an average age of 57 years, and had at least one of several conditions—high blood pressure, high blood glucose, high triglycerides or low HDL cholesterol—that can raise the risk for diabetes or cardiovascular disease. Diabetes can raise the risk for cardiovascular disease. Study participants were asked to practice their usual eating habits for an eight-week control period. Participants were then instructed to continue their usual eating habits for another eight-week period and were told to add 2 ounces of walnuts per day while adjusting for the extra calories from the walnuts so their daily calorie intake would be consistent with the control phase.

After eight weeks of daily walnut intake, the study participants' blood vessel function improved significantly compared to the control phase, their body weight and waist circumference remained stable, and they experienced a beneficial trend in reduction of systolic blood pressure; however that did not quite reach statistical significance.

The study results provide evidence that walnuts can play a role in protecting against heart disease in at-risk individuals. The researchers are currently conducting another study to see if the beneficial health effects of consuming walnuts hold true for a six-month time period for adults who are at risk of developing diabetes.

 
 
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