A new study published in PLOS ONE suggests that peppermint oil may offer a simple, affordable approach to managing mildly elevated blood pressure. Researchers at the University of Lancashire found that daily doses of peppermint oil reduced systolic blood pressure by an average of 8.5 mmHg over 20 days, with minimal side effects reported.
The Study Design
In the trial, 40 adults aged 18 to 65 with prehypertension or stage 1 hypertension received either 100 microliters of peppermint oil twice daily or a peppermint-flavored placebo. Those receiving the active oil showed measurable improvements in systolic blood pressure, while the placebo group experienced little change. The researchers also monitored diastolic blood pressure, heart rate, body measurements, blood test results, mental well-being, and sleep quality.
Why This Matters
Lead author Dr. Jonnie Sinclair noted that high blood pressure remains one of the biggest causes of heart disease and death worldwide, requiring substantial healthcare expenditure. While medications are commonly prescribed, questions remain about their long-term effectiveness and potential side effects. Peppermint oil contains compounds such as menthol and flavonoids, which may account for its blood-pressure-lowering effects.
Clinical Implications
The findings carry particular significance because peppermint oil is low in cost and calories, potentially offering a simple and cost-effective solution to treat millions of people globally. Dr. Sinclair emphasized that the results have significant clinical implications given that arterial hypertension is the most common preventable risk factor for cardiometabolic disease and the greatest single risk factor for global mortality.
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