In a mouse model of bleomycin-induced pulmonary fibrosis, Du et al. demonstrated that oral administration of naringenin attenuated bleomycin-induced pulmonary fibrosis, as shown by histological staining and quantification of collagen content in the lung, by inhibiting TGF-β1 secretion and decreasing regulatory T cells [5]. The gene discussed is TGFB1; the disease is pulmonary fibrosis.