Insulin therapy has been the key treatment for type 2 diabetes with associated side efects such as hypoglycemia and weight gain. However, treatment with FGF21 is without these side efects . FGF21 has been demonstrated to stimulate glucose uptake and utilization by inducing glucose trans porter-1 (GLUT1) expression among white adipose tissue (WAT), brown adipose tissue (BAT) and browning WAT . Further analysis revealed that the induced GLUT1 expression is mediated by β-klotho ERK1/2- Ets-like protein-1 (Elk-1)/ serum response factor (SRF) signaling cascade thereby trans-activating GLUT1 gene through a highly conserved cis-element within its pro moter . In another study, Li et al.