Peppermint oil is a concentrated extract made from the leaves of the peppermint plant (Mentha × piperita), a hybrid of watermint and spearmint. Rich in natural compounds such as menthol and flavonoids, it is widely used in foods, medicines, and aromatherapy for its cooling sensation and potential health benefits. Credit: Shutterstock Peppermint oil lowered blood pressure in adults with mild hypertension during a 20-day study, offering a potentially inexpensive and effective treatment option. New research suggests that daily peppermint oil supplements may help reduce mildly elevated blood pressure. Researchers at the University of Lancashire found that taking 100 microliters (about...