Effects P. ginseng berry extract on Oil Red O staining in cultured 3 T3-L1 adipocytes. 3 T3-L1 cells were treated with 100 μg/ml of P. ginseng berry extract. (a) Effects of P. ginseng berry extract on fat droplet formation in 3 T3-L1 cells. It was stained with Oil Red O dye and examined with a light microscope; (b) Relative lipid content by quantification method of Oil Red O staining. Data are presented as average ± SD (n =5). * indicates *** p <0.001 compared with control (expressed by t-test).