Fig. 1.

Total phenolic content a and antioxidant activities b of mangosteen peel extract. DW stands for distilled water. EtOH stands for ethanol. GAE stands for gallic acid equivalents. AEAC stands for ascorbic acid equivalent antioxidant capacity. DPPH and ABTS stand for 1,1-diphenyl-2-picrylhydrazyl radical (DPPH^•) and 2,2´-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) radical cation (ABTS^•+) scavenging activity. FRAP stands for ferric reducing antioxidant power. Vertical bars represent standard deviation of the mean (n = 3). All means are significant difference at P ≤ 0.05 (Suttirak and Manurakchinakorn 2009)