Table 2.

Scavenging effects of ISSE on ABTS ^{· +}

Herbal formula	Concentration	Scavenging effect	RC 50 1
	(μg/mL)	(%)	(μg/mL)
ISSE2	25	18.20 ± 1.33	121.65 ± 0.88
	50	29.48 ± 0.86
	100	49.98 ± 0.61
	200	71.85 ± 0.06
AA3	1.25	21.15 ± 0.19	3.22 ± 0.06
	2.5	40.61 ± 1.44
	5	75.86 ± 1.06

¹Concentration required for 50% reduction of ABTS^{· +} at 5-min reaction.

²Insampaedok-san and ³ascorbic acid.

Each value is the mean ± S.E.M. of triplicate determinations.