Posts Tagged “blood pressure”
by American Heart Association
Researchers found that eating more fruits and vegetables as young adults was associated with less calcified coronary artery plaque 20 years later. Coronary artery calcium can be measured by a CT scan to detect the presence and amount of atherosclerosis, a disease that hardens arteries and underlies many types of heart disease.
The researchers divided data from 2,506 study participants into three groups, based on their daily fruit and vegetable consumption. Women in the top third ate an average of nearly nine servings of daily fruits and vegetables and men averaged more than seven daily servings. In the bottom third, women consumed an average 3.3 daily servings and men 2.6 daily servings. All servings were based on a 2,000-calorie-a-day diet.
Researchers found that people who ate the most fruit and vegetable at the study’s start had 26 percent lower odds of developing calcified plaque 20 years later, compared to those who ate the least amount of fruits and vegetables.
Previous studies have shown a strong association between eating more fruits and vegetables and reduction in heart disease risk among middle-age adults. However, this is the first study to examine whether eating more fruits and vegetables as young adults could produce a measurable improvement in the health of their heart and blood vessels years later.
“People shouldn’t assume that they can wait until they’re older to eat healthy—our study suggests that what you eat as a young adult may be as important as what you eat as an older adult, ” said lead author Michael D. Miedema, M.D., senior consulting cardiologist and clinical investigator at the Minneapolis Heart Institute, Minneapolis, Minnesota.
Researchers studied health information from adults in the Coronary Artery Risk Development in Young Adults (CARDIA) study, a government-funded study of black and white young adults, which started in 1985. At the study’s start, participants provided a detailed diet history, information on other lifestyle variables and cardiovascular risk factors such as blood pressure, whether or not they smoked cigarettes, weight and others. Twenty years later, participants underwent a CT scan to check for buildup of calcium on the walls of the arteries of the heart, which is calculated as a coronary artery calcium score. Higher coronary calcium scores are associated with a higher risk for heart attacks and other coronary heart disease events.
“Our findings support public health initiatives aimed at increasing fruit and vegetable intake as part of a healthy dietary pattern,” Miedema said. “Further research is needed to determine what other foods impact cardiovascular health in young adults.”
by American Pistachio Growers
FRESNO, Calif. — Pistachio nuts, singled out among other nuts, seem to have the strongest effect on reducing blood pressure in adults. This is according to a recent review and scientific analysis of 21 clinical trials, all carried out between 1958 and 2013. The review appears online in The American Journal of Clinical Nutrition, a publication of the American Society for Nutrition.
Hypertension contributes to more than 7 million deaths annually worldwide attributed to cardiovascular disease. While numerous studies have shown eating nuts provides cardiovascular benefits to healthy as well as to high risk individuals and those with type 2 diabetes, the authors state that, to their knowledge, no systematic review and meta-analysis of published randomized controlled trials has been conducted to assess the effect of nut consumption on blood pressure.
The researchers concluded that nut consumption can reduce blood pressure and particularly systolic blood pressure. Of the nuts studied, pistachios seemed to have the strongest effect in reducing both systolic and diastolic blood pressure.
This review and analysis included subjects with and without type 2 diabetes, recognizing the consumption of nuts could affect blood pressure in people with or without type 2 diabetes in different ways. Subgroup analyses based on the type of nut consumed suggest that pistachios significantly reduce both systolic and diastolic blood pressure, where mixed nuts reduce only diastolic blood pressure. When those with type 2 diabetes were removed from the analysis, only pistachios decreased systolic blood pressure as well.
Databases were searched for randomized clinical trials (RCTs) that reported the effect of consuming single or mixed nuts including walnuts, almonds, pistachios, cashews, hazelnuts, macadamias, pecans, peanuts and soy nuts on systolic blood pressure or diastolic blood pressure. Twenty-one trials were selected which studied 1,652 adults, ages 18-86 years.
The study points out that pistachios contain monounsaturated fatty acids and high amounts of phytosterols which may have beneficial effects on blood pressure and other nutrient qualities that lead to a reduction in oxidized LDL cholesterol and an improved antioxidant status. The study conclusion says although some medications and exercise appear to be effective in reducing blood pressure, healthy diets that include tree nuts may help to enhance their effectiveness and even result in reducing the dosage of hypertension medications.
The review was conducted in accordance with the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) statement and was registered in an international prospective register of systematic reviews. Meta-analysis consists of applying statistical methods for combining the findings from different independent but similar studies. Reviewers followed strict criteria for including or excluding studies and then pooled and tested the data for sources of agreement or disagreement.
The authors of the study reported no funding was received for this study and none of the authors declared a conflict of interest.
About American Pistachio Growers
American Pistachio Growers (APG) is a non-profit trade association representing more than 625 grower members in California, Arizona and New Mexico. APG is governed by an 18-member board of directors who are growers and is funded entirely by growers and independent processors with the shared goal of increasing global awareness of nutritious, American-grown pistachios. The United States has been #1 in global pistachio production since 2008.
Looking for healthy food in your local supermarket produce department. 
Nuts are often cited for healthy reasons – and a new study on pistachios is favorable.
A Pennsylvania State University study published online this month in Hypertension, an American Heart Association Journal, reveals that including pistachios in a healthy diet may positively reduce the body’s response to the stresses of everyday life.
Adults with elevated cholesterol were enrolled in a randomized, controlled clinical trial comparing diets containing pistachios to a low fat diet. The results show that a healthy diet supplemented with pistachios helps decrease systolic blood pressure, peripheral vascular resistance and heart rate during acute stress. Cardiovascular responses were measured while participants engaged in a challenging mental arithmetic test and again as they immersed their foot in cold water.
The study conducted at Pennsylvania State University by Drs. Sheila G. West and Penny M. Kris-Etherton and colleagues examined how diets containing pistachios
(one-and-a-half and three ounces per day) versus a low-fat diet without pistachios, affect responses to stress on subjects with elevated LDL cholesterol, but normal blood pressure. This study is the first to show that including both salted and unsalted pistachios in a healthy diet helps reduce blood pressure and lessen the vascular load on the heart.
The people in the study were healthy, non-smoking men and women with elevated LDL cholesterol (commonly regarded as bad cholesterol) but normal blood pressure. All of the meals were provided and calorie levels were customized to maintain body weight. Pistachios were substituted for other foods in the diet to prevent weight gain. Participants followed three different diets – one low fat diet (25% fat ) without pistachios, and two with different levels of pistachios (approximately 1.5 oz or 10% of calories from pistachios and 3.0 oz or (20% of calories from pistachios). The pistachio diets contained higher amounts of potassium, healthy fats and protein. All diets were rich in fruit, vegetables, lean meats, and whole grains, consistent with current food-based dietary recommendations. Participant demographics and the diet design have been published previously.2
“Daily events, such as work stress, a tight deadline, or public speaking can increase blood pressure, and we know that we can’t avoid all of the stressors in our lives. These results are significant because they show that physiological responses to stress are affected by the foods we eat,” stated Sheila West, Ph.D., Associate Professor of Biobehavioral Health and the study’s lead author. Dr. West continues, “These changes in blood pressure occurred even though self-reported mood, anxiety, and tension were not changed.”
The largest drop in blood pressure, – 4.8 mm Hg, was associated with eating about one-and-a-half ounces of pistachios a day versus a -1.8 mm Hg on the low-fat diet and, -2.4 mm Hg, three ounces of pistachios per day. The diet containing three ounces of pistachios resulted in a significant decrease in peripheral vascular resistance, a measure of artery stiffness and heart rate versus the control diet. Fifty percent of the pistachios were given salted as a snack and the other half were unsalted and incorporated into recipes. Interestingly, although high sodium intake is typically associated with high blood pressure, the largest drop in in blood pressure was not associated with the lowest sodium diet. Pistachios do provide potassium (8% Daily Value) and magnesium (8% Daily Value) which are important in maintaining a healthy blood pressure.
“In addition, these results are very exciting because they demonstrate further benefits of pistachios on another risk factor for cardiovascular disease,” added Penny M. Kris-Etherton, Ph.D., R.D., Distinguished Professor of Nutrition, and a lead researcher for the study. Dr. Kris-Etherton adds, “Our previous research suggests including pistachios in a healthy diet lowers LDL cholesterol in a dose-response fashion2 and increases antioxidants in the blood.”
“This research adds to the growing body of literature on the health benefits of pistachios,” added Constance J. Geiger, Ph.D., R.D. who serves as a nutrition research consultant with the American Pistachio Growers. Dr. Geiger continues, “Nuts, such as pistachios, are an important part of a healthy diet.”
For more information and to read the full study, go to hyper.ahajournals.org.1
About the Study
The research support was provided by the Western Pistachio Association, now known as the American Pistachio Growers, with partial support from the NIH-supported General Clinical Research Center at Pennsylvania State University. It was first reported on in 2007. It is relevant because lowering blood pressure may reduce the risk for stroke and heart disease.
Pistachios Pack Powerful Nutrition
In recent years the U.S. Food and Drug Administration (FDA) recognized that tree nuts, including pistachios, may help reduce the risk of heart disease when eaten as part of a diet low in saturated fat and cholesterol. Since then, the American Pistachio Growers have committed to learning more about the nutritional benefits of pistachios and the nuts’ impact on other health issues affecting Americans today.
Pistachio Facts
Pistachios are a naturally cholesterol-free and sodium-free snack that contains just 1.5 grams of saturated fat and 13 grams of fat per serving, the majority of which comes from monounsaturated and polyunsaturated fat. A one-ounce serving of pistachios equals 49 nuts, which is more nuts per serving than any other snack nut. One serving has as much potassium (290mg, 8 percent) as an orange (250 mg, 7 percent) and 3 g of fiber making it a nutritious snack choice or ingredient to incorporate into daily diets.
About American Pistachio Growers
American Pistachio Growers (APG) is a voluntary trade association representing members who are pistachio growers, processors and industry partners in California, Arizona and New Mexico. These states represent 100% of the domestic commercial pistachio production. APG pistachios are the “Official Snack” of both USA men’s and women’s water polo teams and Miss California. For more information, visit http://www.AmericanPistachios.org.
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¹West SG, Gebaurer SK, Kay CD, Bagshaw DM, Savastano DM, Diefenbach C, Kris-Etherton P. Diets Containing Pistachios Reduce Systolic Blood Pressure and Peripheral Vascular Responses to Stress in Adults with Dyslipidemia. Hypertension. 2012 Jun 4. [Epub ahead of print] doi:10.1161/HYPERTENSIONAHA.111.182147
2Gebauer SK, West SG, Kay CD, Alaupovic P, Bagshaw D, Kris-Etherton PM. “Effects of pistachios on cardiovascular disease risk factors and potential mechanisms of action: A dose-response study.” Amer J Clin Nutr. 2008;88:651–9.
3Kay CD, Gebauer SK, West SG, Kris-Etherton PM. “Pistachios increase serum antioxidants and lower serum oxidized-LDL in hypercholesterolemic adults.” J Nutr. 2010;140:1093-98.
Source: American Pistachio Growers
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