2.5. Diet
All of the mice were fed solid formula feed after 7 days of acclimation , the mice were divided into four groups (n= 20) using a randomized block design in accordance with body weight: −UV(hairless mice fed the control diet only),+uv(uv-irradiated hairless mice fed a diet containing 0.5% red ginseng extract), and H2.5 + UV (UV-irradiated hairless mice fed a diet containing 2.5% red ginseng extract). The animals in each group were fed their experimental diets for 12 weeks (i.e., during the UVB irradiation regimen). The compositions of the experimental diets given to each group are shown in Table 1. The amount of dietary fat (supplied as corn oil) was fixed at 10% of the dietary weight.