Dr. Buddha Dawn (Medicine) recently published an article, “Vitamin D3 Induces Mesenchymal-to-Endothelial Transition and Promotes a Proangiogenic Niche through IGF-1 Signaling,” in iScience, a Cell Press journal. The results show that vitamin D3, a natural compound, can promote blood vessel formation by inducing an endothelial phenotype in mesenchymal stem cells, which also form a niche conducive to blood vessel growth.