No announcement yet.

Whole Grain Diets Reduces Blood Pressure

  • Filter
  • Time
  • Show
Clear All
new posts

    Whole Grain Diets Reduces Blood Pressure

    Diets rich in whole-grain foods, high in soluble or insoluble fibre, reduce blood pressure in people with slightly elevated cholesterol levels.

    Researchers from U.S. Department of Agriculture, Beltsville, examined the effects on blood pressure of whole-grain diets containing insoluble fibre (whole wheat and brown rice) and soluble fibre (barley).

    The researchers analysed 7 men, 9 premenopausal women, and 9 postmenopausal women, all with mildly high cholesterol, who were put on the controlled Step I American Heart Association diet for 2 weeks. After that, refined carbohydrates in the Step I diet were replaced with whole-grain foods. Two types of whole-grain diets - whole wheat/brown rice, barley, or half wheat-rice/half barley) were each consumed for 5 weeks. Blood pressure was measured weekly and weight was measured daily before breakfast.

    It was observed that blood pressure decreased significantly during the all whole-grain diets. Systolic blood pressure, the top reading, declined by 2.2 mm Hg when the subjects consumed the Step I diet and declined by an additional 1.4 to 6.7 mm Hg while subjects consumed the whole-grain diets. Diastolic blood pressure, the lower reading, declined by 2 mm Hg on the Step I diet and was reduced an additional 2.9 to 3.7 mm Hg when whole-grains were added.

    Among men, the greatest reduction in arterial pressure was observed during the half-and-half diet, while the greatest reduction in arterial pressure for women occurred during the diet with barley. Postmenopausal women were the least responsive. Subjects lost about 1 kg during the course of the study, a significant difference. Compared to the Step I diet, calorie levels were significantly higher during all whole-grain diets.

    The findings suggest that increasing whole-grain foods, whether high in soluble or insoluble fibre, can reduce blood pressure and help in controlling weight.