Medical News Today (MNT)Take Peppermint Oil for Hypertension, New Study Suggests: Here’s Why

⚠️ Small Study / Early Comparative Evidence

A 40-participant RCT published in PLOS One found that 100 μL/day of peppermint oil reduced systolic blood pressure by approximately 8.5 mmHg and lowered resting heart rate versus placebo after 20 days in adults with elevated or stage 1 hypertension.

Patient Counseling Points

• Results are hypothesis-generating; the trial enrolled only 40 participants over 20 days, limiting generalizability
• Proposed mechanism involves menthol-mediated TRPM8 channel activation and vascular smooth muscle relaxation, but direct mechanistic measurement was not part of this trial
• Effect size (8.5 mmHg systolic reduction) is clinically plausible but requires replication in larger, longer, more diverse trials before drawing conclusions

Patient Care Applications

• Redirect patients who ask about peppermint oil toward established lifestyle modifications as first-line non-pharmacological approaches
• Recognize that patient interest in low-cost supplements may signal openness to lifestyle counseling
• Avoid framing this finding as an adjunctive recommendation until mechanism and durability are established in adequately powered trials