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Showing posts with label walnuts. Show all posts

Whole walnuts and their extracted oil improve cardiovascular disease risk

Sunday, May 18, 2014

Consumption of whole walnuts or their extracted oil can reduce cardiovascular risk through a mechanism other than simply lowering cholesterol, according to a team of Penn State, Tufts University and University of Pennsylvania researchers.

"We already know that eating walnuts in a heart-healthy diet can lower blood cholesterol levels," said Penny Kris-Etherton, Distinguished Professor of Nutrition, Penn State. "But, until now, we did not know what component of the walnut was providing this benefit. Now we understand additional ways in which whole walnuts and their oil components can improve heart health."

In a randomized-controlled trial, the researchers gave 15 participants with elevated blood cholesterol one of four treatments -- either 85 grams of whole walnuts, 6 grams of skin, 34 grams of defatted nutmeat, or 51 grams of oil. The team evaluated biochemical and physiological responses in the participants before the treatments were administered and again 30 minutes, one hour, two hours, four hours and six hours after administering the treatments. The researchers repeated this process for each of the remaining three treatments.

Results -- which will appear in the June 1 issue of the Journal of Nutrition and are now online -- showed that a one-time consumption of the oil component in walnuts favorably affected vascular health. In addition, consumption of whole walnuts helped HDL -- good cholesterol -- perform more effectively in transporting and removing excess cholesterol from the body.

"Our study showed that the oil found in walnuts can maintain blood vessel function after a meal, which is very important given that blood vessel integrity is often compromised in individuals with cardiovascular disease," said Claire Berryman, graduate student in nutritional sciences, Penn State. "The walnut oil was particularly good at preserving the function of endothelial cells, which play an important role in cardiovascular health."

According to the researchers, walnuts contain alpha-linolenic acid, gamma-tocopherol and phytosterols, which may explain the positive effects of the walnut oil treatment.

"Implications of this finding could mean improved dietary strategies to fight heart disease," said Berryman. "The science around HDL functionality is very new, so to see improvements in this outcome with the consumption of whole walnuts is promising and worth investigating further."

Further studies are needed to determine the mechanisms that account for cardiovascular disease risk reduction with walnut consumption, according to Kris-Etherton.

"Our study indicates that simple dietary changes, such as incorporating walnuts and/or their oil in a heart healthy diet, may reduce the risk of heart disease," she said.

A Daily Serving of Walnuts Cuts Breast Cancer Risk

Monday, April 28, 2014

Researchers from Marshall University in West Virginia report in the journalNutrition and Cancer that small amounts of walnuts eaten daily can significantly lower the risk of breast cancer in women. Walnuts are a naturally great tasting source of healthy Omega-3 fats, minerals, vitamins and protein that have long been associated with good health.

Interestingly, it is not only the potent dose of Omega-3 fats that are responsible for the risk reduction, but a synergistic effect between multiple nutrients provided by the nut. Scientists now confirm that eating two ounces of this super food each day can significantly lower your risk of developing this insidious killer disease.

Regular Walnut Consumption Slows Breast Cancer Tumor Progression

The study was conducted using mice that are genetically predisposed to develop breast cancer tumors. Lead researcher, Dr. Elaine Hardman set out to determine the effect of a typical diet and a walnut-enhanced diet through an entire lifespan. Scientists examined dietary nutrition supplied by the mother through conception and weaning and then by eating walnuts directly. Mice are frequently used for this type of research because they follow similar patterns of breast cancer carcinogenesis when compared to humans.

Dr. Hardman found that the group whose diet included walnuts from conception to late life developed breast cancer at less than half the rate of the group consuming a typical diet. In addition, the number of tumors and their sizes were significantly smaller. Of the results, she commented“These reductions are particularly important when you consider that the mice were genetically programmed to develop cancer at a high rate... we were able to reduce the risk for cancer even in the presence of a preexisting genetic mutation.”

Walnuts Provide a Perfect Blend of Essential Nutrients

Researchers noted that they were unable to determine if the cancer prevention benefits were the result of deletions or additions to the diet. Adding healthy Omega fats from walnuts displaced unhealthy fats and balanced Omega-3 to Omega-6 ratios to lower systemic inflammation and oxidized LDL cholesterol levels that result in cancer development. Other studies including walnuts have shown that there are multiple health benefits achieved from the unique blend of fats, vitamins (especially vitamin E) and minerals in the flavorful nut.

The result of this study continues to add to the wealth of scientific evidence that natural nutrients provided by an array of `super foods` significantly contribute to our health. Dr. Hardman concluded“Food is important medicine in our diet… the results of this study indicate that increased consumption of walnuts could be part of a healthy diet and reduce risk for cancer in future generations.”It`s easy to add two ounces of walnuts (about 14 halves) to your daily diet to prevent breast cancer and a host of other chronic diseases.

Walnuts in ones diet can protect against diabetes and heart disease

Sunday, March 9, 2014

Medical researchers from the Yale-Griffin Prevention Research Center in Connecticut have found evidence suggestive that adding walnuts to ones diet can protect against diabetes and heart disease in at-risk individuals. Their original research article, "Effects of Walnuts on Endothelial Function in Overweight Adults with Visceral Obesity: A Randomized, Controlled, Crossover Trial," is now available in the Journal of the American College of Nutrition, the Official Publication of the American College of Nutrition, and a publication from Routledge.

For the study, a sample of 46 adults aged 30-75 were selected. Participants had a Body Mass Index larger than 25, and a waist circumference exceeding 40 inches for men and 35 inches for women. They were also required to be non-smokers, and all exhibited one or more additional risk factors for metabolic syndrome, a precursor of diabetes and cardiovascular disease. The group was randomly assigned to two 8-week sequences of either a walnut-enriched ad libitum diet or an ad libitum diet without walnuts. Those chosen for the walnut diet were instructed to consume 56g of shelled, unroasted English walnuts per day as a snack or with a meal.

"We know that improving diets tends to be hard, but adding a single food is easy," explained Dr. David Katz, Director of the Yale-Griffin Prevention Research Center and lead author of the research team. "Our theory is that if a highly nutritious, satiating food like walnuts is added to the diet, there are dual benefits: the benefits of that nutrient rich addition and removal of the less nutritious foods."

The research found that daily intake of 56g of walnuts improves endothelial function in overweight adults with visceral adiposity. The addition of walnuts to the diet does not lead to weight gain. Further study on the topic is still suggested. "The primary outcome measure was the change in flow-mediated vasodilatation (FMD) of the brachial artery," wrote the research group. "Secondary measures included serum lipid panel, fasting glucose and insulin, Homeostasis Model Assessment-Insulin Resistance values, blood pressure, and anthropometric measures. FMD improved significantly from baseline when subjects consumed a walnut-enriched diet as compared with the control diet. Beneficial trends in systolic blood pressure reduction were seen, and maintenance of the baseline anthropometric values was also observed. Other measures were unaltered."

Almonds and Walnuts Prevent Heart Disease and Diabetes

Friday, February 21, 2014

Man has evolved to eat almonds and walnuts in their natural form and extensive research confirms the benefits to our health. It’s no coincidence that the ratio of fats and other essential nutrients are in perfect balance with our own nutritional needs.

Studies confirm that almonds and walnuts promote heart health by regulating blood lipids and help to prevent diabetes by controlling blood glucose and factors which lead to metabolic syndrome. You can boost your health by adding these nuts to your regular diet and reap the many health benefits.

Poor Diet Increases Risk of Heart Attack

Cardiovascular disease is the leading killer of adults and there’s solid evidence that including a handful of nuts to your diet each day can have a significant impact on the health of your heart. The typical diet consists of excessive calories from sugars, ined carbohydrates and hydrogenated fats from fried foods. This type of diet negatively influences blood lipids, causing an uneven balance of LDL and HDL cholesterol. Problems arise when the LDL particles become very small and oxidized as a result of eating too much processed food.

Small LDL particles are known to lead to the formation of foamy plaque which is used by our body to pack the small micro cracks which occur in the delicate inner lining of the coronary arteries. Once the LDL cholesterol becomes oxidized, typically from a diet high in hydrogenated trans fats, the substance becomes sticky and quickly forms into dangerous plaque which can narrow the arteries. This sets the stage for a blockage and can lead to a heart attack.

Eat Nuts Daily for Heart Health

According to a study published in The American Journal of Clinical Nutrition, eating nuts on a regular basis can help to change the blood lipid chemistry to reduce the risk from coronary artery disease and death from a heart attack. Nuts are loaded with beneficial monounsaturated and Omega-3 fats which directly control the size of the LDL cholesterol particles as well as oxidation properties which make the particles less cohesive and less likely to form plaque.

It’s important to note that eating nuts is just one powerful tool in your dietary toolbox for fighting heart disease. To dramatically lower your risk of heart disease, you must cut out ined carbohydrates, wheat based foods and eliminate sugar as this type of diet fuels atherogenic blood fats and heart disease. Use nuts as a compliment to your healthy diet.

Almonds and Walnuts Help Prevent Diabetes

The continual blood sugar spikes seen in many people after eating are a sign of metabolic dysfunction which leads to diabetes. A diet high in sugar and processed carbs drives this condition which can lead to devastating complications including blindness, kidney failure and neuropathy. A study published in The Journal of Nutrition demonstrates that eating almonds before a meal helps to decrease the wild blood sugar swings from a high carb meal. This helps to lower the risk of developing diabetes and can even assist in the treatment of the disorder when used as part of a healthy diet.

Almonds and walnuts are nutritional super foods which have been shown to provide essential health benefits. These natural foods help regulate blood lipids and glucose to lower the risk of heart disease and help to prevent diabetes. In addition to eliminating sugar, wheat and processed carbs from your diet, try adding a handful of these nuts to your menu each day for optimal health benefits.