Figure 3: Blueberry polyphenolic enriched-extract did not affect caspase-3 activity in HepG2 cells. Cells were treated with vehicle or 12.5- 50 μg/ml of polyphenolic extract for 96 h and absorbance of cell lysates containing caspase-3 substrate were measured at 405 nm. Absorbance was converted to μM using a caspase-3 standard curve. Samples activities were normalized to their protein contents. Data are reported as the mean ± SEM of 3 independent experiments. Means that share letters are not significantly different from each other (p<0.05).