Phytochemical Composition, Antioxidant Activity, and Neuroprotective Effect of Terminalia chebula Retzius Extracts

Table 2

Antioxidant activities of the three extracts for Terminalia chebula and positive control.

Extract and positive control	HRP-luminol-H2O2 assay^a	Pyrogallol-luminol assay^a	CuSO4-Phen-Vc-H2O2 assay^a	Luminol-H2O2 assay^a
Extract
Methanol extract	6.9±1.9	184.8±12.3	6.3±0.2	1.7±0.3
Water extract	42.4±4.1	235.5±22.6	4.5±1.2	1.3±0.2
95% ethanol extract	17.7±5.8	146.0±5.9	6.7±1.7	1.8±0.2
Positive control
Vitamin C	14.8±6.2	>1000	688.3±29.7	32.8±8.9
Trolox	3.2±0.1	209.6±17.0	5.8±1.0	0.8±0.1

The data are presented as mean ± SD for three replicates.
^aIC₅₀ values in μg/mL.