Moreover, SP significantly down‐regulated the expression of distal lung epithelial progenitor genes (Rawlins, 2008) at 12 days, and cancer stem cell markers (ALDH1A1 and ALDH3A1) expression (Figs 5K and EV3F and G) implying propionate's effect on cancer stemness related to EMT. Here, ALDH3A1 is linked to cancer.