Vitamin D Deficiency and Bones (image) DOE/Lawrence Berkeley National Laboratory Caption These 3-D reconstructions of crack paths show in the normal bone (left) pronounced crack deflection by splitting along the interfaces of the osteons accompanied by the formation of crack bridges. In vitamin D-deficient sample, the crack takes a tortuous breaking path across the osteons with no crack bridging. Credit Courtesy of Ritchie and Bale, Berkeley Lab Usage Restrictions None 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.