Table 2.

Scavenging/inhibitory effects of the Piper betle extract against DPPH, ONOO^-, and Total ROS generation

Sample	DPPH IC 50 (µg/ml)	ONOO - IC 50 (µg/ml)	ROS IC 50 (µg/ml)
MPBL	16.33±1.02*	25.16±0.61*	41.72±0.48*
Ascorbic acid	12.10±0.02
L-penicillamine		10.20±0.32
Trolox			12.32±0.19

IC₅₀ values are mean±SEM (n=3);

^*p < 0.001 by student t-test for values between the sample and the control.