Table 3.

Scavenging effects of ISSE on DPPH

Herbal formula	Concentration	Scavenging effect	RC 50 1
	(μg/mL)	(%)	(μg/mL)
ISSE2	50	1.55 ± 0.53	346.93 ± 3.28
	100	8.58 ± 0.59
	200	26.48 ± 0.61
	400	58.58 ± 0.52
AA3	2.5	9.56 ± 1.26	10.43 ± 0.23
	5	24.27 ± 1.40
	10	58.79 ± 0.70

¹Concentration required for 50% reduction of DPPH at 30-min reaction.

²Insampaedok-san and ³ascorbic acid.

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