Shrimp (IMAGE) American Chemical Society Caption Scientists have identified two food additives with previously unrecognized estrogen-like effects. One of the additives, 4-hexylresorcinol, is used to prevent discoloration in shrimp and other shellfish. Credit National Cancer Institute, Renee Comet 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.