Eating refined carbohydrates like bagels may stimulate brain regions involved in reward and cravings, research suggests. iStockphoto.com hide caption

itoggle caption iStockphoto.com

A woman sells bananas at the Kampala Airport. Ugandans eat about a pound of the fruit, on average, per day. Ronald Kabuubi/AP hide caption

itoggle caption Ronald Kabuubi/AP

Researchers at Rice University conducted lab studies using light-dark cycles to try to coax more beneficial compounds out of fruits and vegetables. Heather Rousseau/NPR hide caption

itoggle caption Heather Rousseau/NPR

How many calories in that bite? My Fitness Pal and other fitness and nutrition apps can help find the answer. Heather Rousseau/NPR hide caption

itoggle caption Heather Rousseau/NPR

Delicious — in moderation, folks. Randy Bayne/Flicker Creative Commons hide caption

itoggle caption Randy Bayne/Flicker Creative Commons

Lebanese bread topped with za'atar, a spice mix ubiquitous in the Middle East. Photostock Israel/Getty Images hide caption

itoggle caption Photostock Israel/Getty Images