Fig. 2.

Comparison of total phenolic contents and DPPH radical-scavenging activity of different ginseng extracts. (A) Total phenolic contents of ginseng extracts were determined using Folin–Ciocalteu assay. Gallic acid was used as a reference compound, and total phenolic content of each extract was expressed as the value of gallic acid equivalent (i.e., GAE in mg/g). (B) Antioxidant effects of samples were determined using DPPH radical-scavenging assays. Gallic acid was used as a positive control. All data are expressed as mean ± SD, n = 5. Statistical comparison was made with the sample with the lowest value of corresponding concentration, *p < 0.05, **p < 0.01, ***p < 0.001.

SD, standard deviation.