Kombucha made by artisan tea brewer Bill Bond in Akron, Ohio, comes in an array of flavors, such as lemongrass, ginger, blueberry and watermelon. Peggy Turbett/The Plain Dealer /Landov hide caption

itoggle caption Peggy Turbett/The Plain Dealer /Landov

Experts say lots of factors determine how quickly an oil deteriorates — from the variety of the olives, to how the oil is produced and stored. Matthias Schrader/AP hide caption

itoggle caption Matthias Schrader/AP

MBA students from McGill University in Montreal are building a company to mass produce grasshoppers, seen here at a market in Oaxaca, Mexico. William Neuheisel/Flickr hide caption

itoggle caption William Neuheisel/Flickr

Goodbye, Sodas. McDonald's says it will now market and promote Happy Meals only with milk, water or juice. Bill Parrish Photography/PR Newswire/AP hide caption

itoggle caption Bill Parrish Photography/PR Newswire/AP

About 40 years ago wheat breeders introduced new varieties of wheat that helped farmers increase their grain yields. But scientists say those varieties aren't linked to the rise in celiac disease. Karen Bleier/AFP/Getty Images hide caption

itoggle caption Karen Bleier/AFP/Getty Images

Chef Mike Isabella, who owns three restaurants in Washington, D.C., came up with the Fit for Hope weight loss challenge for his peers in the restaurant industry. Donald Bowers/Getty Images Entertainment hide caption

itoggle caption Donald Bowers/Getty Images Entertainment

If you eat fish, rather than take a fish-oil supplement, is there more likely to be a benefit? There's more than a suggestion that this is indeed the case. Verena J Matthew/iStockphoto hide caption

itoggle caption Verena J Matthew/iStockphoto

Appalachia has a distinct culture of sipping soda constantly throughout the day. "Here in West Virginia, you see people carrying around bottles of Mountain Dew all the time — even at a public health conference," says public health researcher Dana Singer. Jin Lee/Bloomberg via Getty Images hide caption

itoggle caption Jin Lee/Bloomberg via Getty Images

Fourth year Tulane medical school student Neha Solanki (far right) preps a Greek frittata during a class at Johnson & Wales. Kristin Gourlay/ RIPR hide caption

itoggle caption Kristin Gourlay/ RIPR

Teenagers put in more than two hours a day of TV time on average, still more than what pediatricians say is healthy. iStockphoto.com hide caption

itoggle caption iStockphoto.com

Differences in brain chemistry can affect an individual's likelihood of weight gain. Katherine Streeter for NPR hide caption

itoggle caption Katherine Streeter for NPR