![Osteoporosis affects one in three women and one in five men over the age of 50.](https://imagenes.elpais.com/resizer/v2/JGE3MLTRIJERHF2T4AFH7RMLCA.jpg?auth=09f7d8678fd4c30a7e0b8a3169503aa62a83449f27df525a5627817aaac919b3&width=414&height=233&smart=true)
Researchers discover hormone capable of strengthening bones
A new study has found a possible explanation for why nursing mothers maintain robust bone mass despite calcium loss. The discovery, in the laboratory, opens the door to treatments against osteoporosis