Peppermint is a cross between watermint and spearmint and is native to Europe. Historically this natural herb has been known for its medicinal uses; therefore, is often referred to as the world's oldest medicine. Adding this essential oil to an all natural dead sea salt equals a great product!! Peppermint essential oil can be used externally for providing pain relief, and can improve blood circulation. This combination is a powerful weapon for tired  feet; hence, our name "Happy Feet". You feet will thank you for this 8 oz jar!