Pennyroyal is a plant that is indigenous to native Europe and resembles grass in its original form. It smells of mint when it is crushed and has tremendous healing power. There is a steam distillation process that includes isomenthone, neomenthone and pulegone that it goes through in order to become oil. Because it has such a high level of pulegone, it can actually be classified as poisonous in large amounts. So it's kind of remarkable that this plant has been used for years in ancient times as a folk medicine staple. Accuracy of dosage is incredibly important.
