A recent mouse model based study suggests that blocking TGF-β may improve osteoporosis treatment by helping quiescent osteoblasts in inactive bone surfaces return to an active state. Using spatial transcriptomics, single-cell analysis, and functional experiments, researchers identified TGF-β signaling as a regulator of osteoblast activation. In a bone-loss mouse model, dual inhibition of TGF-β and sclerostin increased bone mass more effectively than sclerostin inhibition alone, highlighting a promising combination strategy.