Scientists may have discovered a surprisingly simple way to help lower mildly high blood pressure: peppermint oil.
A new study from researchers at the University of Lancashire found that small daily doses of peppermint oil lowered blood pressure in adults with early-stage hypertension.
The findings were published in the scientific journal PLOS One and may open the door to a new low-cost treatment approach for people with slightly raised blood pressure.
High blood pressure, also known as hypertension, affects millions of people worldwide. It is one of the biggest risk factors for heart disease, strokes, and other serious health problems.
One reason hypertension is so dangerous is that many people do not feel sick even when their blood pressure is high. Over time, however, the extra pressure damages blood vessels and forces the heart to work harder.
Doctors usually recommend lifestyle changes such as exercise, weight loss, healthier eating, and reduced salt intake to control mild hypertension. Many patients also take medications to lower blood pressure.
Although blood pressure drugs can be very effective, they sometimes cause side effects and may not work equally well for every person.
Researchers have therefore been exploring whether natural compounds from plants could also help support healthy blood pressure.
Peppermint has been used for centuries in foods, drinks, and traditional remedies. It contains substances such as menthol and flavonoids that may affect blood vessels, circulation, and inflammation.
In the new study, scientists tested whether peppermint oil could produce measurable effects on blood pressure.
The study included 40 adults aged between 18 and 65 who had either pre-hypertension or stage 1 hypertension.
Participants were randomly divided into two groups. One group received peppermint oil while the other group received a peppermint-flavored placebo that did not contain the active oil.
The participants taking peppermint oil consumed 100 microliters twice daily over a period of 20 days.
Researchers then measured changes in blood pressure and several other health indicators.
The results showed that people taking peppermint oil experienced an average drop of 8.5 mmHg in systolic blood pressure.
Systolic blood pressure is the top number in a blood pressure reading and reflects the pressure inside arteries when the heart contracts.
The placebo group did not show meaningful improvements.
Scientists also monitored heart rate, sleep quality, body measurements, blood test results, mental well-being, and diastolic blood pressure, which is the lower number in blood pressure readings.
The overall results suggested that peppermint oil may positively affect cardiovascular health.
Lead researcher Dr. Jonnie Sinclair explained that high blood pressure is one of the leading causes of illness and death worldwide.
He said hypertension also creates enormous healthcare costs because it contributes to so many chronic diseases.
Dr. Sinclair noted that peppermint oil appeared to be simple, inexpensive, and well tolerated by participants.
Researchers believe peppermint oil may help relax blood vessels, allowing blood to flow more easily through the body.
The study findings are especially interesting because the reduction in systolic blood pressure was large enough to potentially reduce long-term cardiovascular risk if maintained over time.
However, scientists caution that the study was still small and short-term.
Because only 40 participants were included, researchers cannot yet say with certainty how well peppermint oil would work in larger populations.
The study also lasted only 20 days, so scientists still need to understand whether the blood pressure improvements would continue over months or years.
Future research will also need to test whether peppermint oil is safe and effective for people with more severe hypertension or other medical conditions.
Experts emphasize that people should not replace prescribed blood pressure medications with peppermint oil unless advised by their doctor.
Still, the findings highlight growing scientific interest in natural therapies that may support traditional medical care.
Researchers increasingly believe that nutrition, plant compounds, exercise, stress reduction, and lifestyle habits all work together to influence long-term heart health.
Even small reductions in blood pressure can have important health benefits over time because they reduce strain on the heart and blood vessels.
The study also reminds people that managing blood pressure often requires a combination of approaches rather than relying on a single treatment.
For now, doctors still recommend proven healthy habits such as regular exercise, healthy eating, maintaining a healthy weight, and avoiding smoking as the foundation of blood pressure control.
But if future studies confirm these results, peppermint oil may one day become another simple tool to help people protect their hearts.
If you care about high blood pressure, please read studies that drinking tea could help lower blood pressure, and early time-restricted eating could help improve blood pressure.
For more health information, please see recent studies about added sugar in your diet linked to higher blood pressure, and results showing vitamin D could improve blood pressure in people with diabetes.
The study was published in PLOS One.
Source: University of Lancashire.
