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The effect of V. opulus extracts on intracellular ROS generation analyzed by DCFH-DA assay after 24 h incubation with juice (FJ) and PRF (phenolic rich fraction) (A), MAE (methanol-acetone extract) and AE (acetone extract) (B). Control cells were not exposed to any compound but the vehicle; values are means ± standard deviations from at least three independent experiments; statistical significance was calculated versus control cells (untreated) * p ≤ 0.05, *** p ≤ 0.001.
