The bone disease osteoporosis is caused by more bone cells being resorbed than being deposited. This imbalance results in a progressive loss of bone density and a thinning of bone tissue. Osteoporotic bones are more porous and therefore more vulnerable to fracture.
Review Date: 4/25/2015
Reviewed By: Emily Wax, RD, The Brooklyn Hospital Center, Brooklyn, NY. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.