Comparison of the pentosidine, methylglyoxal, glyoxalase 1 activity, and advanced glycation end product (AGE) production in HDF cells before and after the treatment. Pentosidine, methylglyoxal, and AGE production was induced by 10 mJ/cm2 of UVB irradiation (A,B,D). The induced pentosidine, methylglyoxal, and AGE concentrations were significantly reduced after treatment with 1000 μg/mL of EverCTPTM (NEWTREE Co., Ltd., Seoul, Korea). Glyoxalase 1 activity was reduced by 10 mJ/cm2 of UVB irradiation, and the reduced glyoxalase 1 activity was significantly increased with treatment of 1000 μg/mL of EverCTPTM (C); *** p < 0.005, independent samples t-test. HDF, human dermal fibroblast; ultraviolet-B; UV, ultraviolet.