Fig. 3. Histological observation of hair follicles in C57BL/6 mice. The back skins of the mice were shaved and test compounds were topically applied for 4 wks. H&E stain, ×100. Scale bar 200 μm. (A) transverse view of hair follicles, (B) vertical view of hair follicles. SA; saline, JO; jojoba oil, MXD; 3% minoxidil, PEO; 3% peppermint oil.