Allison Aubrey Allison Aubrey is a correspondent for NPR News.

Cody Vasquez, 11, is from Arizona. His winning dish was shrimp tacos with watermelon jicama salad. Jeff Elkins for Epicurious hide caption

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Jeff Elkins for Epicurious

Listen to Kiana Farkash

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A nutrient-dense diet may help tamp down stress. And these foods may help boost our moods (clockwise from left): pumpkin seeds, sardines, eggs, salmon, flax seeds, Swiss chard and dark chocolate. Meredith Rizzo/NPR hide caption

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Food-Mood Connection: How You Eat Can Amp Up Or Tamp Down Stress

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You can find wood pulp in several brands of packaged shredded cheese. It helps keep the cheese from clumping. Maggie Starbard/NPR hide caption

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Maggie Starbard/NPR

From McDonald's To Organic Valley, You're Probably Eating Wood Pulp

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Researchers say the polyphenols in dark chocolate can help the body form more nitric oxide, a compound that causes blood vessels to dilate and blood to flow more easily. iStockphoto hide caption

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Rugby and meat: a treat for the gut? A study suggests yes. Here Tony Woodcock (left) and Owen Franks of the All Blacks rugby team turn sausages on the barbecue in 2011 in Christchurch, New Zealand. Phil Walter/Getty Images hide caption

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School Lunch Debate: What's At Stake?

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The FDA is recommending that pregnant women eat 8 to 12 ounces per week of fish such as salmon, canned light tuna, tilapia or cod. Iakov Filimonov/iStockphoto.com hide caption

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Doughnuts at a Krispy Kreme store in Washington, D.C. An environmental coalition says leading doughnut companies like Krispy Kreme source palm oil from suppliers who are clear-cutting rain forests and destroying wildlife habitat. Meredith Rizzo/NPR hide caption

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Doughnut Day Downer: Palm Oil In Pastries Drives Deforestation

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A selection of low-alcohol wines, including a Riesling from Germany, a Vinho Verde from Portugal and a Txakoli from the Basque region of Spain. Meredith Rizzo/NPR hide caption

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The Secret's In The Sugar: Lower-Alcohol Wines Are Taking Off

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A mock-up of a warning label for sodas and sugary drinks proposed in California by public health advocates. California Center for Public Health Advocacy hide caption

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California Center for Public Health Advocacy

Currently, half of all products served in the school lunch program must be "whole-grain rich," which USDA defines as products made of at least 50 percent whole grain. According to the new standards, by the start of the next school year, schools must use only products that are whole-grain rich. Rogelio V. Solis/AP hide caption

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Rogelio V. Solis/AP