Magnolol is a dual agonist of both RXRα and PPARγ, with EC50 values of 10.4 µM and 17.7 µM, respectively. Magnolol (26.2-80 µM) binds to RXRαLBD and PPARγLBD in a dose dependent manner, with Kd values of 45.7 µM and 1.67 µM, respectively. Magnolol (1-20 µM) induces the transcription of PPRE in a dose-dependent manner, but shows no activity on RXRE transcription. Magnolol (1, 3, 10 µM) enhances adipocyte differentiation of both 3T3-L1 pre-adipocystes and C3H10T1/2 pluripotent stem cells in the presence of insulin. Magnolol (10 μM) upregulates mRNA expression of marker genes for adipocyte differentiation. Magnolol (1, 10 μM) shows an increase in basal and insulin-stimulated glucose uptake in differentiated 3T3-L1 adipocytes.