Peppermint oil has a long history of medicinal uses, practiced by many different cultures around the world. Perhaps the most famous and widely used is that of peppermint oil as a digestive aid. Strong organic compounds in this essential oil have a calming effect on the digestive muscles, calming muscle cramps, preventing such diseases as nausea, diarrhea, indigestion, bloating and flatulence. Another classic use of essential mint oil is to concentrate on the mind, improve memory, and promote vigilance without causing nervous signature and anxiety associated with other stimulants such as caffeine.