Fig. 2 (IMAGE) Osaka University Caption D-Alanine maintains circadian rhythm and its related physical conditions for health. Credit Tomonori Kimura Usage Restrictions Credit must be given to the creator. 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.