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
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CPAP masks have become much more comfortable than in years past, doctors say. But most of the time, they're probably not the first thing to try for sleep apnea. iStockphoto.com hide caption
Differences in brain chemistry can affect an individual's likelihood of weight gain. Katherine Streeter for NPR hide caption
"Studies show there is an association between regularly skipping breakfast and higher body mass index," an obesity researcher says. "But it does not necessarily represent cause and effect." iStockphoto.com hide caption
Dreaming of slimming gut microbes? iStockphoto.com hide caption
The tale of the tape may be told, in part, by the microbes inside you. iStockphoto.com hide caption
The roots of obesity are complex and include genetics and other factors beyond individual choice, research shows. iStockphoto.com hide caption
Lose pounds and gain grams of gold in Dubai. iStockphoto.com hide caption
Late nights lead people to eat more. Fabio Cardoso/Corbis hide caption
Eating refined carbohydrates like bagels may stimulate brain regions involved in reward and cravings, research suggests. iStockphoto.com hide caption
Weight loss has been a key component of diabetes treatment for centuries. iStockphoto.com hide caption
Engineered deliciousness: more of a problem than sedentary lifestyles? iStockphoto.com hide caption