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Dietary soy is one of several factors that might explain the lower incidence of coronary heart disease in Asian countries than in Western countries. In a randomized, crossover trial, 60 healthy postmenopausal women followed the National Cholesterol Education Program (NCEP) diet or the NCEP diet with 25 g of soy protein supplied as one half cup of unsalted soy nuts (i.e., roasted soy beans) daily while maintaining an equivalent total protein content. Each phase was continued for 8 weeks, and researchers assessed the effect of the diets upon lipids and blood pressure (BP). Patients with systolic BP ≥165 mm Hg or diastolic BP of ≥100 mm Hg were excluded from the trial.
Mean BP was lower with soy than without, both among hypertensive women (137/…