In vitro activity: Bezafibrate is a lipid-lowering fibric acid derivative. Bezafibrate binds to xPPARβ with EC50 of 5 μM. Bezafibrate transcriptionally activates the PPARβ of Xenopus with EC50 of 1 μM. Bezafibrate exposure to rat primary culture of adipocytes for 24 h increases the mRNA levels of crucial genes involved in peroxisomal and mitochondrial β-oxidation. The mRNA levels of the peroxisomal β-oxidation rate-limiting enzyme acyl-CoA oxidase and of the muscle-type carnitine palmitoyl transferase I (M-CPT-I) increases by 1.6-fold and 4.5-fold, respectively. Bezafibrate induces an increase in the transcript levels of the uncoupling protein-2 (UCP-2; 1.5-fold induction) and UCP-3 (3.7-fold induction), mitochondrial proteins that reduce ATP yield and may facilitate the oxidation of fatty acids. Furthermore, Bezafibrate increases the mRNA levels of the fatty acid translocase (2-fold induction). Bezafibrate causes a 1.9-fold induction in 9,10-[3H]palmitate oxidation. Moreover, Bezafibrate reduces the mRNA expression of several adipocyte markers, including PPARγ (30% reduction), tumor necrosis factor-α (33% reduction), and the ob gene (26% reduction). The reduction of the adipocyte markers causes by Bezafibrate is accompanied by an increase in the mRNA levels of the preadipocyte marker Pref-1 (1.6-fold induction).