L-Quebrachitol (L-QCT), a natural product isolated from many plants, promotes proliferation and cell DNA synthesis. L-Quebrachitol upregulates bone morphogenetic protein-2 (BMP-2) and runt-related transcription factor-2 (Runx2) and regulatory genes associated with mitogen-activated protein kinase (MAPK) and Wnt/β-catenin signaling pathway, while down-regulating the receptor activator of the nuclear factor-κB(NF-κB) ligand (RANKL) mRNA level.