Peppermint is a hybrid species of spearmint and water mint. Peppermint essential oil gives a cooling sensation and has a calming effect on the body, which can relieve sore muscles when used topically. Peppermint oil may be used for aromatherapy, helping to support the upper respiratory system for brief periods during times of need. It also has antimicrobial properties so it can help freshen bad breath and soothe digestive issues. Peppermint oil acts as an expectorant and decongestant, and may help clear your respiratory tract. Use peppermint essential oil as a cold rub on your chest or inhale it through a vaporizer to help clear nasal congestion and relieve cough and cold symptoms. Medicinally, peppermint leaf may be used for supporting the gastrointestinal tract as well as the gallbladder and bile ducts. It is specifically used to support healthy bowel function. It is also helpful in relieving headaches, stress, allergies, nausea and asthma.