By: Lauren Lange MSH,RD,LD/N
A recent randomized, double-blind, placebo-controlled clinical trial, found that daily bluberry consumption significantly improves systolic and diastolic blood pressure and arterial stiffness in post menopausal women with pre-hypertension and stage-1 hypertension (high blood pressure).
This study was conducted over eight weeks, in which participants (48 post menopausal women with pre-hypertension and stage-1 hypertension) were randomly either given 22 g freeze-dried blueberry powder (equivalent to 1 cup of fresh blueberries) or 22 g control powder.
Blueberries: a tiny, anti-oxidant rich, & exciting functional food.
The results of the study showed a 5.1% reduction in mean systolic blood pressure and 6.3% reductions in mean diastolic blood pressure in the group receiving blueberry powder, whereas there were no significant reductions in the group receiving the control powder. The researchers attribute the effect of blueberries on improvement in blood pressure through the increased production of nitric oxide and its vasodilatory effect.
This study suggests that “regular consumption of blueberries over the long term could potentially delay the progression of hypertension and reduce cardiovascular risk in postmenopausal women.”
Source: Johnson SA, Figueroa A, Navaei N, et al. Daily Blueberry Consumption Improves Blood Pressure and Arterial Stiffness in Postmenopausal Women with Pre- and Stage 1-Hypertension: A Randomized, Double-Blind, Placebo-Controlled Clinical Trial. Journal of the Academy of Nutrition and Dietetics. 2015.
Published online: DOI: http://dx.doi.org/10.1016/j.jand.2014.11.001