# Peppermint oil lowers blood pressure in just 20 days Twice-daily peppermint oil intake proven to reduce mildly elevated blood pressure. - **Source:** [Latest Science News -- ScienceDaily](https://brifing.si/source/0eef8637-6c5b-4e79-8f5b-6c9c6b36cf16) - **Published:** 2026-08-22 - **Original article:** - **On Brifing:** https://brifing.si/s/720750bd-d9a0-47ae-8fd3-91857e352b23 ## Effect of peppermint oil on blood pressure A study at the University of Lancashire found that participants taking 100 microliters of peppermint oil twice daily experienced an average 8.5 mmHg drop in systolic blood pressure after 20 days. These results offer a simple and cost-effective solution for those with mildly elevated blood pressure. Peppermint oil contains natural compounds like menthol and flavonoids. The study, published in PLOS One, involved 40 adults aged 18-65. ## Research methodology Participants with prehypertension or stage 1 hypertension were divided into two groups. One group received real peppermint oil, while the other received a placebo. After 20 days, the peppermint oil group showed blood pressure reduction, while the placebo group had no significant change. The study examined not only systolic blood pressure but also diastolic pressure, heart rate, and other health indicators. ## Clinical significance Lead author Dr. Jonnie Sinclair emphasized that high blood pressure is a leading cause of heart disease and death worldwide. He noted that current medications have uncertain long-term effects and can cause side effects. Peppermint oil could be a low-cost, side-effect-free alternative with potential global reach. ## Global burden of hypertension Arterial hypertension is the most common preventable risk factor for cardiometabolic diseases and the single greatest risk factor for global mortality. Simple, accessible solutions like peppermint oil are crucial. The research highlights the widespread potential of this low-calorie, affordable option. ## Participant profile The study included 40 adults aged 18-65 with mildly elevated blood pressure. Participants were randomly assigned to receive either active peppermint oil or a placebo. Throughout the study, parameters like body measurements, blood tests, and sleep quality were monitored. ## Components of peppermint oil Peppermint oil contains bioactive compounds like menthol and flavonoids. Menthol is known to have vasodilatory effects, while flavonoids have antioxidant properties. This combination may explain peppermint oil's blood pressure-lowering effects. Researchers suggest further studies to investigate these mechanisms in detail. ## Placebo effect and results No significant blood pressure reduction was observed in the placebo group, indicating peppermint oil's effects aren't due to placebo. The randomized, controlled design enhances the results' reliability. However, larger-scale studies are needed to confirm these findings. ## Future research and potential This study reveals peppermint oil's potential in hypertension treatment. However, long-term effects and results in diverse populations require further investigation. Widespread use of peppermint oil could offer an alternative to blood pressure medications and provide significant economic benefits to healthcare systems. These findings hold promise for future clinical applications. ## Sources covering this story - https://www.sciencedaily.com/releases/2026/08/260821012238.htm — --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._