Consumption of walnuts was shown to significantly decrease low-density lipoprotein (LDL) cholesterol and increase high-density lipoprotein (HDL) cholesterol.
A diet containing unsaturated fats, such as those found in walnuts has similar weight loss effects of a low-fat, high-carbohydrate diet, says a new study. The research, led by Dr. Cheryl Rock of the University of California, San Diego School of Medicine, also showed that a diet containing walnuts have a positive effect on improving cholesterol level and heart health.
“Walnuts are higher in fat and calories, the walnut-rich diet was associated with the same degree of weight loss as a lower fat diet, said Dr. Rock.”
The researchers studied 245 overweight and obese women (22-72 years old) enrolled in a one-year behavioral weight loss intervention. The study participants were randomly assigned to three different diets: a lower fat and higher carbohydrate diet, a lower carbohydrate and high fat diet and a walnut-rich, higher fat and lower carbohydrate diet. Those prescribed a walnut-rich diet consumed 1.5 ounces per day.
In the first six months of the intervention, the researchers found that the average weight loss was nearly 8% of initial weight for all groups.
The participants who followed a walnut-rich diet saw comparable weight loss, and improved cholesterol levels, especially in those who are insulin-resistant. In addition to a significant decrease in LDL cholesterol, the walnut participants achieved a greater increase in HDL cholesterol as compared to the other diet groups.
The participants who followed a lower carbohydrate and higher fat diet participants were encouraged to consume foods higher in monounsaturated fats, the walnut-rich diet provided more polyunsaturated fats. Walnuts are the only nut in which the fat is primarily polyunsaturated fat (13g/oz), including a significant amount of alpha-linolenic acid (ALA), the plant-derived form of omega-3 fatty acids (2.5g/oz).
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A handful of walnuts provides fiber and protein, which aids in satiety, a key to weight management. Walnuts are naturally sodium, cholesterol and gluten free.
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Source-Medindia