Research Article

Antiphotoaging Potential of Extracts of Yin-Tonic Herbal Medicine in Skin Cell and Human Skin Equivalent

Figure 2

Effect on cell viability of yin-tonic herbal medicines and UVB irradiation in human skin equivalent model. (a) Cell viability of 3 yin-tonic herbal medicines and (b) UVB irradiation on the human skin equivalent. (c) The schematic diagram of UVB irradiation and treatment with yin-tonic herbal medicines using human skin equivalent model. (d) Effect of UVB irradiation time on MMP-1 production in human skin equivalent model. and versus nontreated group or UVB nonirradiated group.
(a)
(b)
(c)
(d)