Pennyroyal is a member of the mint family and is mentioned in Greek writings as early as 421 B.C. It's scent is a very subtle rosy aroma that was very popular with early English royalty. This essential oil is 100% pure. Fun fact: Back in the days of yore, pennyroyal was also known as "pudding grass" for its use in a stuffing made of pennyroyal, honey, and pepper that was often used in hog's pudding. Pennyroyal is a member of the mint family, and exudes a fresh, minty, herbaceous scent. While its scent is actually a bit more powerful than other mints, its therapeutic value is actually not as strong. Pennyroyal was used frequently by Ancients for a variety of ailments, and remains current in the British Herbal Pharmacopoeia, which recommends it for flatulence, intestinal colic, the common cold, delayed menstruation, and gout. However, its primary use in today's world of aromatherapy is in pet care. Pennyroyal was a favorite of Pliny the Elder in the fight against fleas, and remains a favorite natural enemy of fleas to this day. Mixes well with: Citronella, geranium, rosemary, and sage. Parts used: Fresh or slightly dried herb. Extraction method: Steam distillation.