Concentration

(µg/ml)

Superoxide radical scavenging activity

Phloretin (%)

Standard ascorbic acid (%)

20

22.85 ± 6.50

31.25 ± 2.50

40

49.28 ± 6.25

64.23 ± 5.13

60

68.57 ± 5.50

89.54 ± 7.16

80

82.42 ± 5.00

98.51 ± 7.88

IC50 = 44.16 µg/ml

IC50 = 31.62 µg/ml