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jussipussi
Seuraa 
Viestejä40607
Liittynyt6.12.2009
Blueberries may help reduce blood pressure and arterial stiffness

Over an eight-week period, 48 postmenopausal women with pre- and stage-1 hypertension were randomly assigned to receive either 22 grams of freeze-dried blueberry powder -- the equivalent to one cup of fresh blueberries -- or 22 grams of a placebo powder. Participants, meanwhile, continued their normal diet and exercise routines.

At the beginning of the study, the team took participants' blood pressure and measured their arterial stiffness and select blood biomarkers.

At the end of the eight weeks, participants receiving the blueberry powder on average had a 7 mmHg (5.1 percent) decrease in systolic blood pressure, which is the top number in the blood pressure reading that measures the pressure in the arteries when the heart beats. They also saw a 5 mmHg (6.3 percent) reduction in diastolic blood pressure, or the bottom number measuring the pressure in the arteries between heartbeats.

Additionally, participants in the blueberry-treated group had an average reduction of 97 cm/second (6.5 percent) in arterial stiffness.

They also found that nitric oxide, a blood biomarker known to be involved in the widening of blood vessels, increased by 68.5 percent. That is important, Johnson said, because arterial stiffness and the narrowing of blood vessels are both a part of hypertension. This rise in nitric oxide helps explain the reductions in blood pressure.

http://www.sciencedaily.com/releases/2015/01/150108113525.htm

Stiffening of the arteries appears to be associated with the progressive buildup of beta-amyloid plaque in the brains of elderly patients without dementia, suggesting a relationship between the severity of vascular disease and the plaque that is a hallmark of Alzheimer disease.

http://www.sciencedaily.com/releases/2014/03/140331170546.htm

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