The article discusses a study which investigated the inhibition by gold nanoparticles of the formation of receptor activator of nuclear factor κB ligand (RANKL)-induced osteoclast (OC). It says that the nanoparicles inhibited the production of reactive oxygen species (ROS) and increased antioxidant enzyme level upon bone marrow-derived macrophages (BMMs) stimulation. It notes that gold nanoparicles can diminish bone loss by reducing OC formation.