What Exactly are Whole Grains
Refrigerator Raid offers a concise explanation.
Whole grains contain the entire kernel of the grain, and haven’t been stripped of their bran or germ. Refined grains, on the other hand, have been milled, so they no longer contain their bran or germ. Because of this, they are less nutritious and usually have less fiber. Examples include white rice and white bread.
The bran and germ on a whole grain is rich in B vitamins, fiber and other nutrients. That means it provides your body with lots of nutrition, plus the fiber helps you stay full longer.