As vitamin D can modulate TGF‐β signaling (Ramirez et al. 2010; Luderer et al. 2013), and TGF‐β is associated with ASM proliferation (Chen and Khalil 2006), we investigated if TGF‐β levels were altered in our mouse model of vitamin D deficiency. This evidence concerns the gene TGFB1 and vitamin D deficiency.