Last month, researchers found that eating one type of snack food for six weeks could lower your blood pressure. Plus, this kind of snacking could even improve your blood pressure when you’re under stress. And that’s important, because if you have a high-octane lifestyle, you run a greater risk of developing heart disease.
But can eating one type of food really make a difference? That’s what researchers from Penn State recently set out to discover.
For the study, they recruited 22 healthy adults with elevated LDL and asked them to follow three different dietary programs. The researchers provided all the meals and snacks and closely monitored the participants’ progress.
For the first six weeks, participants ate a "typical" American diet. It was high in fat and carbs, a few fruits and vegetables thrown in here and there, no nuts, and plenty of processed foods.
For the second six weeks, participants again followed a "typical" American diet with two exceptions. They ate a handful of walnuts instead of another unhealthy snack. They also replaced some of the "bad" fat in their diet with one tablespoon of walnut oil. Their overall caloric and fat intake did not change.
For the last six weeks, participants continued to follow a "typical" American diet. But this time researchers included a serving of walnuts, walnut oil, and 1.5 tablespoons of flaxseed oil each day.
To see what kind of affect these dietary changes had on the body, the participants took a series of stress tests…
Walnuts improve your body’s response to stress
At the end of each six-week period, the volunteers took two stress tests. The first test gauged the participants’ reaction to mental stress. Researchers assigned each volunteer a random topic. The volunteers each got two minutes to develop a presentation based on the topic. Then, they had to deliver a three- minute speech on camera. Then, at the end of the presentation, researchers took the participants’ blood pressure.
The second test gauged the participants’ response to physical stress. For this test, they dunked one foot into a bucket of ice-cold water. Again, the researchers measured the participants’ blood pressure to see how their bodies responded to the stress.
Overall, researchers discovered three things. First off, eating walnuts lowered the participants’ resting blood pressure by two to three points.
Secondly, eating walnuts improved blood pressure scores during both types of stress tests. In fact, researchers found that participants significantly lowered their average diastolic blood pressure (the bottom number) in both sets of stress tests when they followed the walnut diets.
Thirdly, the researchers found that adding flax seed oil to the mix didn’t further reduce the participants’ blood pressure. However, adding flax seed did have some other very important benefits.
In fact, during the flax seed oil phase, some of the participants underwent a vascular ultrasound. The results showed that eating flax seed oil (in addition to walnuts) improved the participants’ arterial dilation. The walnuts plus flax seed diet also lowered the participants’ levels of C-reactive protein, an indicator of heart health.
When your stomach grumbles, grab a handful of walnuts
Walnuts are one of the best foods to snack on when you’re stressed. They are rich in fiber and antioxidants. Plus, walnuts and flax seeds both contain alpha linolenic acid, a special kind of omega-3 fatty acid that promotes cardiovascular health. In fact, in another recent study men and women who ate ALA each day reduced their blood pressure by up to six percent. And if you’ve got high blood pressure, that’s not too shabby. It may be enough to get off your blood pressure medicine!
So make one small, positive change in your life today. Substitute a serving of walnuts for one of your snacks each day. Ounce-for-ounce, they’re much more filling than just about any other snack. Plus, they may help you stay calm and collected through even the craziest day. Just make sure they’re fresh. Nuts can go rancid very quickly.
Dr. Allan Spreen
Nationally acclaimed as America’s “Nutrition Physician,” Dr. Spreen has been helping people stay healthy and disease-free as a private doctor, published author, and noted researcher.
In addition to his role as a Senior Member of the prestigious Health Sciences Institute Advisory Panel in Baltimore, MD, Dr. Spreen also coaches diving at the international and Olympic levels. NorthStar Nutritionals is proud to have Dr. Spreen as our Chief Research Advisor.
Dr. Spreen also writes the Guide to Good Health.