Peppermint essential oil gives a cooling sensation and has a calming effect on the body, which can relieve sore muscles when used topically. It also has antimicrobial properties so it can help freshen bad breath and soothe digestive issues.Peppermint is a hybrid species of spearmint and water mint(Mentha aquatica). Uess--Peppermint oil has a long history of medicinal uses, practiced by many various cultures around the world. Probably the most well-known and widely used is that of peppermint oil as a digestive aid. The powerful organic compounds in this essential oil have a soothing effect on the muscles of the digestive tract, calming muscle spasms, and preventing such maladies as nausea, diarrhea, indigestion, bloating, and flatulence.