Bilirubin (IMAGE) Johns Hopkins Medicine Caption Molecular structure of bilirubin (top) and another prevalent antioxidant, glutathione (bottom). Bilirubin's unique structure allows it to protect the brain in ways many other antioxidants cannot. Credit Chirag Vasavda 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.