Records for using mint for medicinal purposes, goes all the way back to the times of Ancient Egypt, Greece, and Rome.
Some people use peppermint oil as part of their beauty and hair care regimen. Its fragrance is pleasant and popularly found in shampoos, skin creams, and other products. Anti-microbial, anti-fungal a little bit goes a long way. Potent mint fragrance.
Warning: Never use essential oils undiluted on the skin.