As known, eating foods that contain isoflavones -- a compound found in soy milk, tofu, green tea, and peanuts – every day may help young adults lower their blood pressure. For the first time, research indicates a particular benefit for African Americans, who have hypertension prevalence rates near 42%, according to researchers at Columbia University, New York, N.Y. T
hey analyzed data from year 20 of the Coronary Artery Risk Development in Young Adults (CARDIA) study, created to examine the development and determinants of cardiovascular disease. This study began in 1985 with 5115 African Americans and whites aged 18 to 30 years old who have been followed and reexamined at various intervals. Year 20 was the first year that participants completed an extensive dietary survey. Multivariable linear regression models evaluated the relation between daily isoflavone intake and systolic BP after dividing patients across quartiles according to self-reported isoflavone intake. Even after controlling for age, sex, BMI, smoking, alcohol, physical activity, and total caloric intake, the relationship between daily isoflavones and lower systolic blood pressure remained.
According to the researchers, compared with those consuming less than 0.33 mg of isoflavones per day, those reporting the most isoflavone intake (more than 2.5 mg per day) had a significantly lower systolic pressure (–5.5 mmHg lower on average). An eight-ounce glass of soy milk has about 22 mg of isoflavones, and 100 g of roasted soybeans have as much as 130 mg. The relatively pronounced results in the overall biracial cohort may be driven by a more intense effect of isoflavones in African Americans, the researchers said.