Breakfast consumption patterns of the U.S. adult population were examined by using the U.S.D.A. Nationwide Food Consumption Survey. Results indicated that approximately one-quarter of the adult population skipped breakfast regularly. For those adults who consumed breakfast, the four most commonly consumed breakfasts were eggs, bread, and coffee; ready-to-eat cereal with milk; coffee and bread; and eggs, bread, and milk. The sample was partitioned by six age/sex classes and by four breakfast consumption patterns. Assessments of average intakes of seven frequently underconsumed nutrients showed that omission of the breakfast meal had a significant negative impact, particularly among adult females, on the diet quality. Findings indicated that for all age/sex classes, consumption of ready-to-eat cereal at breakfast, whether frequently or on a more limited basis, increased the average daily intake levels of the underconsumed nutrients. Further, groups of adults who regularly consumed ready-to-eat cereal at breakfast had, on average, lower average daily intakes of fat and cholesterol. It was concluded that regular breakfast consumption greatly enhanced the overall diet quality of the U.S. adult population.