Figure 5.

Effect of oral CP administration (500 mg/kg and 1000 mg/kg) on A/T ratio of C57BL/6 mice treated for 6 weeks. The follicles in the anagen phase exhibit a large and thick hair bulb located deep in the epidermis. The telogen phase features a small and flat hair bulb located in a shallow layer of the epidermis. The anagen and telogen phases were confirmed by a histopathologist. Values with different superscript letters are significantly different (p < 0.05). The results are the mean ± SE (n = 7/group). NC: negative control (distilled water), PC: positive control (finasteride, 1 mg/kg); CP500: collagen peptide, 500 mg/kg; CP1000: collagen peptide, 1000 mg/kg.