Osteoporosis: What is it? October 2, 2022 Cristiane B. Cruz, CSEP-CEP, MPK Osteoporosis is a condition that causes bones to become thin and porous, decreasing bone strength and leading to increased risk of breaking a bone. Cristiane B. Cruz, R.Kin, MPK, will be discussing how our bones develop, and how they are affected by osteoporosis.