A Protective Shield Against Uranium (IMAGE) Helmholtz-Zentrum Dresden-Rossendorf Caption If uranium is built into the molecule glutathione, the chemical toxicity of the heavy metal decreases. Credit HZDR /Karim Fahmy 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.