As someone who spent 2 years doing NIH sponsored microvascular physiology research (and drinking my share of citrus flavored adult beverages), here’s some great news near and dear to my heart (literally). A recent study looked at drinking orange juice (or a control beverage with a flavonoid found in citrus fruits) and its effect on diastolic blood pressure and microvascular reactivity. Previous citrus based studies of shown that diets rich in citrus are associated with a reduction in cardiovascular events. This study in the January issue of the American Journal of Nutrition[i] examined whole orange juice and the flavonoid hesperidin. The diastolic blood pressure (the bottom number of your BP) can be difficult to significantly reduce with medication, but in the group consuming the citrus it was reduced. The microvascular reactivity was measured using a test which looks at endothelial reactivity. In patients who have cardiovascular problems, this is often one of the earliest signs of dysfunction-just smoking a single cigarette can cause temporary malfunctioning, and this response is often impaired in diabetics who have no other signs of cardiovascular problems. The microvascular reactivity was likewise improved. These improvements were estimated to potentially translate into an approximately 20% risk reduction in cardiovascular events like heart attack and stroke. In comparing the results of whole orange juice to the isolated flavonoid hesperidin, the effect of the whole juice seemed more pronounced. While the study was small with only 24 men studied, the effects suggest some daily OJ can transform that mimosa into a medicinal elixir-oh, it’s great for you straight up, too (The OJ that is.…)
[i] (Morand, et al., 2011)