The most healthful loaves of bread contain chunks of grain still intact, like the seeded loaf on the right. Whole wheat loaves, like the one in the middle, may contain few whole grains and may be made up mostly of refined flour, like the white bread on the left. Meg Vogel/NPR hide caption

itoggle caption Meg Vogel/NPR

Baguettes head into a giant oven at Le Grenier a Pain Bakery. Eleanor Beardsley/NPR hide caption

itoggle caption Eleanor Beardsley/NPR

A man makes bread as residents, background, stand in line in front of a bakery during heavy fighting between Free Syrian Army fighters and government forces in Aleppo, Syria, on Dec. 4, 2012. Narciso Contreras/Associated Press hide caption

itoggle caption Narciso Contreras/Associated Press