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Effect of RGO on cell viability in HepG2 cells. Cells were treated with vehicle (dimethyl sulfoxide: polyethylene glycol, 1:1, v/v, 0.1%) or RGO at the indicated concentrations for 24 h. Cell viability was assessed with MTT assay. Data represent the average ± SD of three independent experiments with similar results. * p < 0.05 compared to the vehicle-treated control. MTT, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide; RGO, red ginseng oil.
