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Eat this

Nuts get the nutrition nod

By Georgia Clark-Albert, Special to the BDN
Posted Dec. 17, 2012, at 12:17 p.m. 

If you’ve perused through the produce section of your local grocery store this holiday season, you’ve probably seen the traditional display of assorted nuts. Studies have shown that cracking open a nut is worth the effort. Nuts are often avoided because of their fat content. Tree nuts, however, contain beneficial unsaturated fats (both mono and polyunsaturated), as well as protein and fiber.

The U.S. Department of Agriculture now allows for a claim on six nuts: “Scientific evidence suggests that eating 1.5 ounces per day of peanuts and certain tree nuts: almonds, hazelnuts, pecans, pistachios and walnuts, as part of a diet low in saturated fat and cholesterol, may reduce the risk of heart disease.”

Keep in mind that the fat in nuts is healthy, but nuts are also high in calories, and a daily limit of 1 or 2 ounces is recommended for most people. Avoid overly salted nuts and the honey glazed choices are these are obviously higher in sodium and calories. Oil roasted nuts have about 10 percent more calories than dry roasted, and dry roasted don’t have any additional fat. Blanched nuts have the skin removed.

Like most other plant foods, nuts are a good source of antioxidants. On average, 10-20 percent of the calories in nuts come from protein. A one ounce serving provides 1-4 grams of fiber depending on the nut.

Nuts are promoted as helping to reduce blood pressure, keeping the heart healthy and decreasing the effects of metabolic syndrome, a group of risk factors that can increase the chance of other medical problems. A study published in the Archives of Internal Medicine in 2008 showed how the addition of nuts can be beneficial in helping to manage metabolic syndrome. At the beginning of the study, 61.4 percent of the participants were considered to have metabolic syndrome. The participants were divided into three groups. The researchers educated one group about consuming a low-fat diet and explained to the other two groups the principals of a diet high in cereals, vegetables, fruits and olive oil, moderate intake of fish and alcohol and a low intake of meats and sweets – often called the Mediterranean Diet. One of the Mediterranean diet groups was given a liter of extra-virgin olive oil each week and the other group was given 30 grams of mixed nuts (one-half walnuts, one-quarter almonds, and one-quarter hazelnuts) per day.

After one year, the prevalence of metabolic syndrome decreased by 13.7 percent in the nut group, 6.7 percent in the olive oil group and 2 percent in the control group. Participants’ weight did not change over the one-year period. However, the number of individuals with large waist circumference, high triglycerides, or high blood pressure significantly decreased in the Mediterranean diet plus nuts group compared with the control group.

Each type of nut may have its own health benefits so it is good to eat assorted nuts. Walnuts have almost twice as many antioxidants as any other commonly consumed nuts, including peanuts, pistachios, cashews and pecans. Coming in second as an antioxidant choice is the pecan. Peanuts (actually a legume, not a nut) contain the B-vitamin folate not often found in nuts. Peanuts also contain the flavonoid resveratrol, also found in red grapes and red wine (although peanuts contain a lot less). Pistachios are great sources of lutein and zeaxanthin, two carotenoid antioxidants that accumulate in the retinas of our eyes. Pistachios also have the most vitamin A, beta-carotene and potassium. Almonds are considered the healthiest, most nutritious nuts of the USDA chosen six. They have the most vitamin E and fiber and are also a good source of potassium.

A serving of nuts is about 1/3 cup, or about an ounce, and is equal to about:

20-24 almonds

8-10 Brazil nuts

15-18 cashews

4 chestnuts

20-21 hazelnuts

10-15 macadamias

15-20 pecan halves

28-30 peanuts

2 tablespoons pine nuts

70 pistachios in shells

10 whole walnuts

For a last minute gift or a quick snack to take along to a party try this recipe for Almonds Mocha from The Almond Board of California.

Almonds Mocha

6 Tbls. sugar

2 Tbls. unsweetened cocoa powder

1 Tbls. instant coffee granules

1 egg white

2 cups whole natural almonds

Preheat oven to 325 degrees. In container of electric blender, combine all ingredients except egg white and almonds. Blend 30 seconds, pulsing on and off; set aside. In large bowl, whisk egg white until opaque and frothy. Add almonds; toss to coat. Add sugar mixture; toss gently to coat evenly. Oil, or coat a baking sheet with vegetable cooking spray. Arrange almonds on baking sheet in single layer. Bake in center of oven 15 minutes. Gently toss almonds and arrange again in single layer. Continue to bake 15 minutes longer; toss gently. Turn off oven. Leave almonds in oven with door ajar 15 minutes. Remove from oven; cool completely. Store in airtight container up to two weeks.

Georgia Clark-Albert is a registered dietitian and adjunct nutrition instructor at Eastern Maine Community College who lives in Athens. Read more of her columns and post questions at bangordailynews.com or email her at This e-mail address is being protected from spambots. You need JavaScript enabled to view it. .

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Walnuts 'improve sperm health'

Eating around two handfuls of walnuts a day improves sperm health in young men, a study in the journal Biology of Reproduction suggests.

Sperm shape, movement and vitality improved in men who added walnuts to their diet over 12 weeks.

The fatty acids found in these nuts are thought to have helped sperm development. It is not known if this would help improve male fertility.

About one in six couples are infertile, with 40% of these due to a male factor.62293749_f0033703-walnuts-spl

Dr Allan Pacey, senior lecturer in andrology at the University of Sheffield said: "It would be relatively easy to poke fun at studies like this, but there is increasing evidence to show that aspects of a man's diet can affect the number and quality of sperm produced by his testicles."

The researchers say the next step is to work with couples who are attending infertility clinics to determine if placing sub-fertile men, with poor semen quality, on a walnut diet results in better success conceiving.

It is thought that infertility in men may be a result of too few sperm being made, or that the sperm have poor swimming ability, size or shape. 

Walnut supplement

This study involved 117 men between the ages of 21 and 35, who were divided into two groups. One group added 2.6 ounces (75 grams) of whole-shelled walnuts to their daily diet.

The other group continued their usual diet but avoided eating tree nuts. Both groups ate a typical Western-style diet.

Lead author, Prof Wendie Robbins from UCLA's Fielding School of Public Health said: "We found a significant improvement in sperm parameters in the group that consumed the walnuts.

Healthy sperm

"The men who ate no tree nuts saw no change."

Sperm quality improved in terms of concentration, vitality, movement, shape and chromosome abnormalities.

Dr Pacey said: "The study has been well executed and my only criticism would be that the men in the walnut-eating arm of the trial could have altered other aspects of their behaviour to give the results shown in the paper.

"A better trial would be to produce tablets of walnut extract that looked identical to a placebo so that the study was completely blind.

"In spite of this, the results of the study show a small but statistically significant improvement in sperm health."

These benefits may be down to the fatty acids in the nuts.

Co-author Catherine Carpenter, from the UCLA Centre for Human Nutrition said: "Walnuts provide a particularly rich source of a-linolenic acid, a natural plant source of omega-3, which we suspect may have been responsible for the improvements we observed."

The walnuts for the study were supplied by the California Walnut Commission and the study was funded by the UCLA Fielding School of Public Health's Centre for Occupational and Environmental Health.

Read the original article: http://www.bbc.co.uk/news/health-19254383

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