The Dietary Guidelines for Americans, published jointly by the U.S. Department of Health and Human Services and the Department of Agriculture every five years, made a striking recommendation in 2005 when, for the first time, they made a distinction between whole and refined grains. Of the three to 10 recommended daily servings of grains, it is encouraged now that half come from whole grains. Depending on calorie needs, it is suggested that all Americans over the age of 2 years should eat at least three l-oz.-equivalent servings of grains each day. Someone with a 2,400-calorie diet should consume eight 1-oz. equivalent servings.
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