Scientific name: Mentha x piperita
Origin: Europe and C Asia
Medicinal use: One of the biggest benefits of peppermint oil is that it can promote digestion and help reduce occasional stomach upset. When you experience occasional stomach upset, after eating a large meal, dilute one drop of peppermint oil in 4 ounces of liquid and drink. Peppermint essential oil is known for its ability to balance gastric acid secretion.