Folic acid study (IMAGE) Emory Health Sciences Caption The participants of an international study on the effectiveness of adding folic acid to iodized table salt in the prevention of serious birth defects hold containers of the fortified salt they received as part of the study. Credit University of Central Florida Usage Restrictions N/A License Original 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.