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Intracellular reactive oxygen species level in human cervical cancer HeLa cells treated with chokeberry anthocyanins, as determined by the fluorescence test with 2′,7′-dichlorofluorescein (DCF). The cells treated with chokeberry extract showed increased fluorescence compared with untreated cells. Data are mean±SD values (n=3), **P<0.01 (very significant) from corresponding control, ***P<0.001 (extremely significant) from corresponding control.
