Fig. 1
From: Inhibition of melanogenesis by Gaillardia aristata flower extract
The antioxidant properties of the effect of Gaillardia aristata flower extract (GAE). Radical scavenging activity was determined using different concentrations of GAE (25, 50, 100, 200, and 500 μg/mL) or vitamin C and trolox by DPPH (a) and ABTS+ (b). The effect of GAE was confirmed by measurement of reducing capacity (c) and total phenolic contents (d). Data are mean ± standard deviation. **p < 0.01 compared with the vehicle-treated group (n = 3)