Ketone supplements worsen performance in trained endurance athletes, researchers find (IMAGE) McMaster University Caption Martin Gibala, professor in the Department of Kinesiology at McMaster University and supervising author of the study. Credit McMaster University Usage Restrictions Editorial use only 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.