Genipin enhances palmitic acid-induced hepatic steatosis. (A) Neutral fat accumulations after 24 h of exposure to control medium, palmitic acid (PA, 250 μmol/L) and PA plus genipin (5 μmol/L) are shown by staining of HepG2 cells with Oil-Red O. (B) Triglyceride level normalized to cellular protein content in HepG2 was determined. Data are expressed as mean ± SEM. ** p < 0.01 compared with the control group, ##p < 0.01 compared with the cells treated with PA. PA, palmitic acid.