A recent study published online in the American Journal of Clinical Nutrition found that drinking orange juice every day may have important heart health benefits. The study indicates that consuming about two cups of 100 percent orange juice every day for one month significantly lowered diastolic blood pressure among men who were slightly overweight, but otherwise healthy. Improvements also were seen in other indicators of cardiovascular health, notably better functioning of the inner lining of blood vessels.
Some of the study highlights are as follows; In this randomized, controlled, cross-over study, 24 otherwise healthy, but, overweight men, aged 50 to 65 years, consumed three different four-week dietary treatments, with a three-week ‘wash-out’ period between each treatment:
500 milliliters a day of 100 percent orange juice, which is equivalent to 17 ounces or about 2 cups of orange juice;
500 milliliters a day of a control drink plus a capsule of 292 milligrams of hesperidin, which was equivalent to the amount naturally found in the 500 milliliters of orange juice provided and;
500 milliliters a day of a control drink plus a placebo.
Significant benefits seen from both the consumption of 100 percent orange juice and the purified hesperidin include:
Improvements in blood pressure: Diastolic blood pressure (DBP), the bottom number in a blood pressure reading, significantly decreased by an average of 5.5 mmHg when the 100 percent orange juice group was compared to the placebo control group and by an average of 3.2 mmHg when the hesperidin group was compared to the placebo control group. DBP is the pressure on artery walls when the heart relaxes between beats. DBP values are an important cardiovascular health indicator: the higher the diastolic blood pressure, the greater the risk for heart attacks, strokes and kidney failure.
Improvements in blood vessel function: The inner lining of blood vessels demonstrated a significantly better ability to widen (called “vasodilation”) immediately following both the orange juice and hesperidin treatments, with orange juice having a more significant effect. When blood vessels widen, there is less resistance to blood flow which leads to a decrease in blood pressure. This reduces the heart’s workload, and serves as an important indicator of overall cardiovascular health.
Heart Health Benefits of 100 Percent Orange Juice
This study supports a larger body of epidemiologic evidence that has shown citrus fruit consumption is associated with a number of cardiovascular benefits including a lower risk of acute coronary events and stroke.
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