Infographic (IMAGE) Tufts University, Health Sciences Campus Caption An 18-year 'report card' on the American diet shows adults are eating too many low-quality carbohydrates. Credit Audrey Jenkins/Tufts University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.