This document discusses grains and provides information about whole grains versus refined grains. It notes that whole grains contain the entire grain kernel, including the bran, germ, and endosperm, while refined grains have been milled to remove the bran and germ. While certain nutrients are added back to refined grains, fiber is not. The document recommends that at least half of grain intake come from whole grains and provides serving size guidelines for grains based on age and sex.