The purpose of this study was to assess consumers' knowledge of current fiber recommendations and their attitudes, understanding, and awareness of health claims on breakfast cereal labels. An incidental sample of 241 respondents was drawn from four grocery stores of a local chain in Utah. Data were collected using a computerized interviewing system. The results suggested that consumers with higher education levels had a better understanding of diet-disease-related messages and a more positive attitude toward health messages on food labels. Knowledge of fiber was significantly correlated with positive attitudes toward health messages and understanding of health messages. Overall, attitudes toward placing diet-disease-related messages on food labels were positive. On a scale of 1 through 250, the mean score was 182.5 +/- 37.5 standard deviation (73%). Consumer knowledge of fiber was low. Out of 15 possible points, the mean score for fiber knowledge questions was 8.8 +/- 2.1 (59%). Consumers were more familiar with the role fiber may play in the prevention or treatment of certain diseases or conditions than with sources, classifications, and recommended intakes of fiber. Understanding of health messages was relatively low (45%). Whereas consumer attitudes toward health messages on food labels were positive, consumers (especially less-educated consumers) did not appear to understand the messages well. These results reiterate the concern for public policymakers to exercise caution and ensure that health messages on food labels are responsible and accurate. The results should also remind dietetic practitioners, who are the nutrition experts, of their continual role in providing and ensuring accurate nutrition education to the public.