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Almonds Have Excellent Antioxidant Benefits

by Thilaka Ravi on April 8, 2010 at 7:43 AM
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 Almonds Have Excellent Antioxidant Benefits

Scientists at Tufts University in Boston, Massachusetts have shown a daily intake of almonds could significantly decrease levels of two biomarkers for oxidative stress in people with high cholesterol.

Coauthor Jeffrey Blumberg and colleagues found that almonds successfully lowered plasma malondialdehyde (MDA) and urinary isoprostanes levels in a group of 27 male and female volunteers with elevated cholesterol.

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Blumberg is the director of the Antioxidants Research Laboratory at the Jean Mayer USDA Human Nutrition Research Center on Aging (HNRCA) at Tufts

The researchers analysed blood and urine samples from the subjects who had consumed three different dietary treatments, consisting of the same amount of calories each, for one month.
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The study was a crossover, randomised clinical trial, so each subject received each treatment in random order.

Treatments consisted of a "full dose" of almonds, defined as 73 grams daily (about 2.5 ounces), a "half-dose" of almonds plus a half-dose of muffins, and a full-dose of muffins as a control.

The subjects consumed a low-fat background diet and were counseled on strategies to maintain weight and to consistently follow their usual exercise routines throughout each test phase.

The researchers wanted to investigate possible antioxidant effects from eating almonds.

The team found that when the volunteers ate the full dose of almonds, their concentration of two biomarkers of oxidative stress-plasma malondialdehyde (MDA) and urinary isoprostanes- were significantly lowered.

MDA decreased by nearly 19 percent compared to the start of the study in the full-dose almond group.

Isoprostane decreased by 27 percent in both the almond groups when compared to the control period, suggesting a possible threshold effect for that biomarker.

While the study helps to show the antioxidant benefit of eating almonds, further research is needed to shed light on the individual contributions of vitamin E and polyphenolic constituents, such as flavonoids, found in almonds and other tree nuts.

The study has been published in the Journal of Nutrition.

Source: ANI
THK
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