Table 1.

Antioxidant activity of grape seed extract (GSE) and its alkalinized version (ATGSE) evaluated by DPPH, ABTS, and FRAP assays.

Compound	DPPH (mol TE/100 g ± SD)	ABTS (mol TE/100 g ± SD)	FRAP (mol TE/100 g ± SD)
GSE	0.39 ± 0.04	0.52 ± 0.02	0.20 ± 0.02
ATGSE	0.32 ± 0.03	0.48 ± 0.02	0.18 ± 0.02

Abbreviations: DPPH, 2,2-diphenyl-1-picrylhydrazyl; ABTS, 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid); FRAP, ferric reducing antioxidant power; TE, Trolox equivalent. Values are the mean ± standard deviation (SD) of three replications. Statistical significance was calculated by Student′s t-test analysis, but no significant data were found.