Mint probably can lower blood pressure, but the size of the effect depends heavily on who you are and what form of mint you’re using. A 2024 meta-analysis pooling results from randomized controlled trials found that mint consumption produced only a small, statistically non-significant drop in blood pressure across all participants, yet a subgroup of people who already had elevated readings saw clinically meaningful reductions. Individual trials using concentrated peppermint oil have reported larger effects, and lab research has identified several plausible biological pathways. The reality, though, is that this field is still young, the trials are small, and your cup of peppermint tea is a very different product than the capsules used in clinical studies.
What the Pooled Evidence Actually Shows
The most comprehensive look at mint and blood pressure comes from a 2024 systematic review and meta-analysis that gathered data from randomized controlled trials of various Mentha species. Pooling all participants together, the researchers found roughly a 1 mmHg reduction in systolic blood pressure and about a 2 mmHg reduction in diastolic blood pressure compared to control groups. Neither result reached statistical significance, meaning the drops could easily have been due to chance.
Where the data gets more interesting is in the subgroup analysis. Among participants over 30 years old and among those whose systolic pressure was already above 130 mmHg or whose diastolic was above 80 mmHg, the reductions were both statistically and clinically significant.1PubMed Central. Effects of Mentha on blood pressure: a GRADE-assessed systematic review and meta-analysis of randomized controlled trials In plain terms, mint doesn’t appear to do much for people whose blood pressure is already normal, but it may produce a real effect in people who have pre-hypertension or mild hypertension. That pattern shows up again and again in herbal blood pressure research: the higher you start, the more room there is for a natural intervention to make a measurable difference.
One important caveat is that the trials included in the meta-analysis varied in the type of mint used, the dose, the form of administration, and the study duration. That kind of heterogeneity makes pooled numbers less reliable. The researchers rated the overall certainty of evidence as low to moderate, which is a polite way of saying we need better and larger trials before anyone should treat this as settled.
The Peppermint Oil Trial That Stands Out
Among individual studies, one 2024 randomized controlled trial deserves special attention because it focused specifically on the population that the meta-analysis identified as most responsive. Researchers gave peppermint oil capsules to patients with pre-hypertension or stage 1 hypertension and compared them against a placebo group over 20 days. The results were striking: after adjusting for baseline values, the peppermint group showed a systolic blood pressure drop of about 8.5 mmHg, a diastolic drop of roughly 4.5 mmHg, and a resting heart rate decrease of about 9 beats per minute compared to placebo.2PubMed Central. Effects of peppermint (Mentha x piperita L.) oil on cardiometabolic outcomes in patients with pre- and stage 1 hypertension
Those are substantial numbers. For context, a systolic drop of 8 to 9 mmHg is in the range you might see from some first-line pharmaceutical interventions or from meaningful lifestyle changes like consistent aerobic exercise. The effect sizes were large by statistical standards. But this was a single trial with a modest sample size and a short duration. Twenty days tells you about an acute to short-term effect; it tells you nothing about whether those reductions hold at six months or a year, or whether they translate into fewer heart attacks and strokes down the road. The trial also used standardized peppermint oil capsules, not tea or fresh leaves, which matters for anyone trying to replicate the results at home.
How Mint Acts on Blood Vessels
The blood pressure effects of mint aren’t random. Researchers have identified at least three mechanisms by which mint compounds could lower blood pressure, and there’s decent evidence for each one at the cellular or animal level.
The most studied mechanism involves menthol, the compound that gives peppermint its cooling sensation. Menthol triggers the release of nitric oxide in blood vessel walls. Nitric oxide is one of the body’s main signals for blood vessels to relax and widen, which directly reduces the resistance blood encounters as it flows, bringing pressure down. Menthol also activates what are called endothelium-derived hyperpolarization factors, which are additional chemical signals that help relax vessel walls through a different pathway. In skin that has been directly exposed to menthol, blood flow increases because of this vessel-widening effect.3PubMed Central. Current Knowledge on the Vascular Effects of Menthol Animal studies have confirmed this: when researchers injected essential oil from a mint species directly into rats, they saw dose-dependent drops in blood pressure along with relaxation of isolated aortic tissue. The researchers concluded the effect came from both vessel-wall-dependent and vessel-wall-independent pathways, including blocking calcium channels that muscles use to contract.4PubMed. Endothelium-dependent hypotensive and vasorelaxant effects of the essential oil from aerial parts of Mentha x villosa in rats
A second mechanism involves inhibition of angiotensin-converting enzyme, or ACE. This is the same enzyme targeted by a major class of blood pressure medications. Lab work has shown that peppermint compounds can block ACE activity in test-tube settings.5LWT – Food Science and Technology. Changes in yogurt fermentation characteristics, and antioxidant potential and in vitro inhibition of angiotensin-1 converting enzyme upon the inclusion of peppermint, dill and basil How well this translates from a lab dish to your circulatory system after you swallow a mint capsule is genuinely unknown, but the finding explains why researchers keep looking at mint as a cardiovascular tool.
A third potential contributor is a diuretic effect. An animal study using spearmint extract found that it increased urine volume and sodium excretion in a dose-dependent manner, with effects comparable to furosemide, a pharmaceutical diuretic commonly used to treat high blood pressure and fluid retention.6Tropical Journal of Pharmaceutical Research. Phytochemical Screening and Evaluation of the Diuretic Activity of Aqueous Methanol Extract from Aerial Parts of Mentha viridis Linn (Labiatae) in Albino Rats Increasing sodium and water excretion reduces blood volume, which in turn reduces pressure. Again, though, this was an animal study using a concentrated extract, not evidence that drinking mint tea will have you running to the bathroom with therapeutic consequences.
Does Breathing Mint In Affect Blood Pressure?
Many people encounter mint not as a food or supplement but as an inhaled essential oil, whether through aromatherapy diffusers or topical menthol products. There is some evidence that even inhalation can produce measurable cardiovascular changes. A study examining peppermint essential oil inhalation found that systolic blood pressure, heart rate, and breathing rate all changed significantly within five minutes of exposure, while diastolic blood pressure showed significant changes after one hour.7PubMed Central. Instant effects of peppermint essential oil on the physiological parameters and exercise performance
These acute changes are worth knowing about, but they don’t necessarily mean inhaling peppermint is a blood pressure treatment. Short-term shifts in heart rate and blood pressure can happen in response to all sorts of stimuli, from cold air to strong smells to momentary stress relief. The question that matters clinically is whether repeated exposure over weeks or months leads to sustained lower readings, and inhalation studies haven’t answered that yet. The research on menthol’s vascular effects also highlights a wrinkle: while menthol widens blood vessels in the tissue it directly contacts, it can actually constrict vessels elsewhere in the body, likely as part of the body’s temperature-regulation response.3PubMed Central. Current Knowledge on the Vascular Effects of Menthol So menthol’s net effect on systemic blood pressure is harder to predict than its local effect on any one blood vessel.
Peppermint and Spearmint Are Not Interchangeable
When people say “mint,” they might mean peppermint, spearmint, wild mint, or one of dozens of other species in the Mentha genus. These plants share some compounds but differ significantly in their chemistry, and that chemistry matters for blood pressure.
Peppermint (Mentha x piperita) is the species with the most cardiovascular research behind it. It contains high concentrations of menthol, which drives the vascular effects described above. Its dominant phenolic compound is eriocitrin.8Food Bioscience. Bioactive properties of powdered peppermint and spearmint extracts: Inhibition of key enzymes linked to hypertension and type 2 diabetes Spearmint (Mentha spicata), by contrast, contains very little menthol and instead is rich in carvone, a chemically distinct compound. Its dominant phenolic is rosmarinic acid rather than eriocitrin. Rosmarinic acid has its own set of biological activities, including antioxidant and anti-inflammatory effects, and researchers have flagged it as a compound of interest for several chronic diseases.9PubMed Central. Biomedical features and therapeutic potential of rosmarinic acid But the specific blood-pressure-lowering evidence for rosmarinic acid in humans is thin compared to what exists for menthol.
Spearmint has been tested for safety at supplement-level doses. A trial giving participants 600 or 900 mg per day of dried spearmint extract for 90 days found no changes in vital signs, blood chemistry, or hormone levels.10PubMed. Safety and tolerability of a dried aqueous spearmint extract That is reassuring from a safety standpoint, but “no changes in vital signs” also means no detectable blood pressure effect at those doses. If you are specifically interested in blood pressure, the existing evidence points more toward peppermint oil or menthol-rich preparations than toward spearmint.
How Mint Compares to Better-Studied Herbal Remedies
Mint is far from the only plant people reach for when they want to manage blood pressure without medication. Hibiscus tea is probably the most studied herbal option, and the comparison is informative. A systematic review and meta-analysis of hibiscus trials found that it reduced systolic blood pressure by about 7 mmHg compared to placebo, with the largest effects in people who started with elevated readings.11PubMed Central. A systematic review and meta-analysis of the effects of Hibiscus sabdariffa on blood pressure and cardiometabolic markers That same review noted that hibiscus produced reductions comparable to some medications in head-to-head comparisons, and also lowered LDL cholesterol. The evidence base for hibiscus is simply larger, more consistent, and more mature than what currently exists for mint.
The peppermint oil trial described earlier did report a systolic drop of roughly 8.5 mmHg, which is actually larger than the hibiscus meta-analysis average. But one trial is not a meta-analysis. The mint meta-analysis, looking across multiple trials and participant types, found a pooled effect closer to 1 mmHg for the overall population. Until more large, well-designed trials specifically target people with elevated blood pressure using standardized peppermint preparations, it’s premature to rank mint alongside or above hibiscus for blood pressure management. If you’re looking for the herbal option with the strongest current evidence, hibiscus has a clear head start.
Mint Alongside Blood Pressure Medications
A practical question many people have is whether mint could interact dangerously with blood pressure drugs. The concern is reasonable: if mint compounds affect the same pathways as pharmaceuticals, adding both could push blood pressure too low or alter how medications are absorbed.
The most relevant study tested whether menthol changes the way the body handles felodipine, a calcium channel blocker commonly prescribed for hypertension. Researchers found that menthol did not meaningfully alter felodipine’s absorption, peak blood levels, or metabolism. Blood pressure and heart rate measurements were also unchanged between the menthol and no-menthol conditions.12PubMed. Effect of menthol on the pharmacokinetics and pharmacodynamics of felodipine in healthy subjects This is reassuring for people who take a calcium channel blocker and also enjoy mint tea or use menthol products. However, felodipine is one drug in one class, and there are many other blood pressure medications that work through different pathways. No comparable interaction studies exist for menthol with ACE inhibitors, beta-blockers, or diuretics. Anyone on blood pressure medication who wants to take concentrated mint supplements, rather than just drinking tea, should talk to their prescriber first.
How Quickly Your Body Processes Menthol
One reason the form of mint you consume matters so much is that your body processes menthol rapidly. A pharmacokinetic study comparing menthol capsules to mint candy and mint tea found that menthol’s active metabolite had a plasma half-life of roughly 45 to 55 minutes, meaning blood levels drop by half in under an hour.13PubMed. Disposition kinetics and effects of menthol The body converts menthol into a water-soluble form and excretes about half of it through the kidneys.
The same study revealed a large difference in how much menthol actually reaches your bloodstream depending on the delivery method. The area under the curve, a measure of total exposure, was about nine times higher for the menthol capsule compared to mint candy and tea. That means swallowing a standardized capsule puts roughly nine times as much menthol into your blood as sipping a cup of mint tea, even if the starting amount of menthol is similar. This gap helps explain why clinical trials using capsules can report significant cardiovascular effects while everyday mint consumption may not register on a blood pressure cuff. It also means you cannot simply extrapolate trial results to your evening cup of peppermint tea. The doses are not in the same ballpark.
What the Active Compounds in Mint Actually Do Beyond Blood Vessels
Peppermint and spearmint extracts contain phenolic compounds that inhibit enzymes linked not just to hypertension but also to type 2 diabetes.8Food Bioscience. Bioactive properties of powdered peppermint and spearmint extracts: Inhibition of key enzymes linked to hypertension and type 2 diabetes Since high blood pressure and insulin resistance frequently travel together (metabolic syndrome involves both), this overlap has led some researchers to wonder whether mint could address multiple cardiometabolic risk factors simultaneously. Rosmarinic acid, the dominant phenolic in spearmint, has attracted attention for antioxidant and anti-inflammatory properties that extend well beyond the cardiovascular system, with preliminary research exploring its relevance to neurodegenerative conditions, liver disease, and cancer.9PubMed Central. Biomedical features and therapeutic potential of rosmarinic acid
None of this means mint is a treatment for diabetes or neurodegeneration. It means the plant contains biologically active molecules that researchers are still figuring out. Blood pressure is just one lens through which these compounds are being examined, and it happens to be the one with the most human trial data so far. The broader point is that mint is not pharmacologically inert. The compounds are real, the mechanisms are plausible, and the clinical evidence is catching up, slowly, to what the test tubes and animal models have been suggesting for years.