FGF21 and Hepatic fibrosis: Among the proteins that were increased over 2‐fold (Figure S4), we chose lactotransferrin (LTF) and α‐lactoalbumin (α‐LA) for further analysis, because they inhibit liver fibrosis.10, 11 Western blot analysis showed that LTF and α‐LA secretion was significantly increased in FGF21_ADSCs CM compared with Empty_ADSCs CM (Figure 2G).