First, grain-based foods are rich in complex carbohydrates, your body's best energy source.

In addition, many grain-based foods supply fiber.

Other types of grain-based foods are rare at that age.

Most of your diet should be made of fruits and vegetables along with grain-based foods - such as breads, cereals, rice, and pasta.

Grain itself represents less than 10 percent of the price consumers pay for bread, cereal and most other common grain-based food.

Watch out for grain-based foods that have added fats and sugars, such as pastries, granola, snack crackers, and chips.

Yet, according to the food pyramid, a half-cup of cooked pasta is one serving and one cup would be two servings of a grain-based food.

Of course, grain-based foods and dried beans and peas are also plant foods that are associated with better health.

All shoppers might have to pay more for grain-based foods.

Dr. Heber has produced a revised version of the Food Pyramid, placing fruits and vegetables at the base, with grain-based foods above them.