Dr. Jeffrey Dilworth (IMAGE) The Ottawa Hospital Caption Dr. Jeffrey Dilworth and his team identified hyaluronic acid as the key ingredient in this internal alarm clock that tells muscle stem cells when to wake up. Credit The Ottawa Hospital Usage Restrictions Only for use in content related to this research 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.