Antioxidant and Ex Vivo Immune System Regulatory Properties of Boswellia serrata Extracts

Table 2

In vitro radical scavenging activity and polyphenolic content of different Boswellia extracts.

Boswellia serrata extracts	Polyphenols; mg GAE/g	DPPH		ABTS		FRAP
		TEAC; μmol TE/g	μg/ml	TEAC; μmol TE/g	IC50; μg/ml	TEAC; μmol TE/g
A	7.68 ± 0.9	31.8 ± 0.7	340.2 ± 3.5	151.8 ± 10.6	79.26 ± 1.8	66.89 ± 3.5
B	1.43 ± 0.5	4.48 ± 0.08	2416 ± 12.5	37.54 ± 2.5	320.30 ± 4.5	ND
C	0.56 ± 0.2	3.83 ± 0.08	2823 ± 27.5	1.92 ± 0.1	6250 ± 17.5	ND
D	1.09 ± 0.4	6.29 ± 0.12	1720 ± 13.8	27.8 ± 1.9	431.62 ± 6.5	ND
E	1.09 ± 0.3	5.41 ± 0.11	1998 ± 17.5	18.7 ± 1.2	641.75 ± 9.5	ND
F	0.96 ± 0.3	5.20 ± 0.15	2080 ± 22.5	20.6 ± 21.4	581.94 ± 8.5	ND
G	0.11 ± 0.05	1.85 ± 0.03	5820 ± 32.5	1.76 ± 0.1	6800 ± 22.5	ND
Positive control
Trolox			10.85 ± 0.2		3.01 ± 0.2

TEAC = Trolox equivalent (TE) antioxidant concentration. IC₅₀ = The concentration of compound that affords a 50% reduction in the assay; GAE = gallic acid equivalent. ND = not detectable.