Ahmed El-Sohemy, Nutritional Sciences (IMAGE) University of Toronto Caption A genetic variation that regulates iron metabolism may enhance athletes' endurance performance, researchers at the University of Toronto have shown. Credit Nutritional Sciences, University of Toronto 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.