Spearmint Tea: The Hormone-Curious Cup, Explained

The screenshot usually arrives in a group chat. A friend of a friend swears her skin cleared up, her cycle steadied, her chin hairs slowed, all thanks to a mug of minty tea, twice a day, photographed in flattering morning light. Somewhere between the third repost and the fourth, spearmint stopped being a garnish and became a wellness protocol.

Here’s the twist: unlike most viral cures, this one isn’t built entirely on air. A pair of small clinical trials, published in peer-reviewed journals, really did measure hormone changes in women who drank spearmint tea. The studies are tiny, short, and frequently oversold, but they exist, which is more than can be said for most things trending in a tea aisle.

So what does the science actually support, what’s extrapolation, and what happens if you make this your daily cup? Let’s separate the leaves from the lore.

What is spearmint tea, and how is it different from other mints?

Spearmint (Mentha spicata) is one of the two mints most of us can name, the other being peppermint. They’re close botanical relatives, peppermint is actually a hybrid of spearmint and watermint, but chemically they part ways in one meaningful spot. Peppermint’s signature compound is menthol, the molecule behind that icy, sinus-clearing blast. Spearmint carries very little menthol. Its dominant compound is carvone, which gives it a rounder, sweeter, almost candy-like flavor. Think chewing gum rather than cough drop.

Brewed as tea, spearmint is a true herbal infusion: dried or fresh leaves steeped in hot water, with no leaves from the tea plant (Camellia sinensis) involved. That means no caffeine: a detail that matters more than it sounds, and one we’ll come back to when we talk about drinking it at night.

Beyond carvone, spearmint leaves contain limonene and a family of polyphenols, most notably rosmarinic acid, an antioxidant compound that also shows up in rosemary and lemon balm. These constituents are the basis for nearly every health claim attached to the plant, from the plausible to the fanciful. The honest summary: the leaf has genuinely interesting chemistry, and a small but real research trail. Whether that trail leads anywhere useful for you depends on which claim you’re chasing, so let’s take them one at a time, starting with the big one.

Is spearmint tea good for female hormones?

This is the claim that launched a thousand shopping carts, and it deserves a careful answer: there is preliminary human evidence that spearmint tea can lower androgens, so-called “male” hormones such as testosterone that all bodies produce, in women who have elevated levels.

Why would anyone think to test that? The idea came from an old clinical observation in Turkey, where researchers noted that men who drank large amounts of mint tea reported reduced libido, prompting the question of whether the plant had anti-androgen activity. That hunch led to two small human trials in women, both of which measured actual hormone levels in blood rather than relying on how participants felt.

Both trials pointed the same direction: free testosterone went down, and certain pituitary hormones (LH and FSH) went up, over days to weeks of regular tea drinking. That’s a real, measurable physiological signal, not nothing.

Now the honest caveats, because they’re substantial. The two studies enrolled a combined total of roughly 60 women. They lasted five days and 30 days, respectively. Neither followed participants long enough to know whether the hormonal shift persists, translates into meaningful symptom relief, or fades. No one has replicated the results in a large, multi-center trial in the fifteen-plus years since. “Promising early signal” is the scientifically accurate phrase. “Balances your hormones”, a phrase that means nothing measurable anyway, is not.

If your hormones feel off, the right first move is lab work ordered by a clinician, not a grocery run. Tea can be a pleasant companion to real care; it can’t replace the diagnosis.

What does the PCOS research actually show?

Polycystic ovary syndrome affects an estimated 8 to 13 percent of women of reproductive age, according to the World Health Organization, and elevated androgens are one of its defining features, driving symptoms like irregular cycles, acne, and excess facial or body hair (hirsutism). That’s why the spearmint findings landed squarely in the PCOS community.

The key study, published in 2010 in Phytotherapy Research, randomized 42 women with PCOS to drink either spearmint tea or a look-alike placebo herbal tea twice daily for 30 days. The results were specific enough to be interesting:

• Free and total testosterone fell significantly in the spearmint group compared with placebo.
• LH and FSH, hormones that help govern ovulation, rose.
• Participants’ own ratings of their hirsutism improved.
• But, and this is the part the headlines skip, the objective, clinician-scored measure of hair growth did not change significantly in 30 days.

That last point isn’t a contradiction; it’s biology. A hair follicle’s growth cycle runs months, not weeks, so even a genuine anti-androgen effect would need far longer than 30 days to show up on skin. The study’s own authors said as much, calling for longer trials. Those longer trials, frustratingly, have never been published.

An earlier 2007 study of 21 women with hirsutism found a similar hormonal pattern after just five days of tea, twice daily, which suggests the effect kicks in quickly, but again tells us nothing about durability. For someone managing PCOS, the practical read is this: spearmint tea is a low-risk experiment worth mentioning to your clinician, alongside, never instead of, the evidence-based care plan you build together.

Can spearmint tea really help with hormonal acne?

Here’s an uncomfortable fact for anyone who arrived via a skincare video: no published clinical trial has ever tested spearmint tea for acne. Not one. The entire acne claim is an inference stacked on top of the hormone studies.

The logic goes like this. Androgens stimulate the skin’s sebaceous glands to produce more oil; excess oil feeds the clogged pores and inflammation that become breakouts. This is why hormonal acne often clusters along the jawline and flares with the menstrual cycle. If spearmint tea lowers androgens, the reasoning runs, it should quiet androgen-driven acne.

It’s not a crazy chain of logic: it’s mechanistically plausible, which is why some dermatologists are open to patients trying it. But plausible and proven are different neighborhoods. The hormone trials measured blood values, not pimples. We don’t know whether the testosterone reduction they observed is large enough or sustained enough to change what happens in a pore. We don’t know the response rate, the time to effect, or who benefits. Every glowing before-and-after you’ve seen is an anecdote, subject to the usual suspects: natural fluctuation, concurrent skincare changes, and the stubborn fact that acne waxes and wanes on its own.

A fair way to think about it: if you enjoy the tea, drinking it daily for two to three months is a low-cost, low-risk experiment, acne timelines are long, so judge nothing in a week. Meanwhile, moderate to severe or scarring acne deserves an actual dermatology visit, because well-studied treatments exist and scars are easier to prevent than to fix.

What happens if I drink spearmint tea every day?

For most healthy adults, the likely answer is refreshingly boring: not much, other than better hydration and a pleasant ritual. Spearmint tea in normal culinary amounts, a cup or two a day, is generally considered safe, and because it’s caffeine-free, it won’t stack onto your coffee count.

What daily drinkers can reasonably expect:

• Hydration with flavor. An unsweetened cup is essentially water with polyphenols, which makes it a painless swap for sugary drinks, arguably its most underrated benefit.
• No caffeine load. Unlike green or black tea, there’s nothing here to raise heart rate or fragment sleep.
• Possible hormone effects. In women with elevated androgens, the trials suggest measurable shifts within days to weeks. In women with normal hormone levels, whether daily spearmint does anything meaningful is simply unstudied.

What daily drinking won’t do: melt fat, “detox” anything (your liver and kidneys handle that full-time, unpaid), or cure a diagnosed condition. And a few people should moderate or check first: those with significant acid reflux, since mint can aggravate heartburn; people who are pregnant, where high intakes haven’t been well studied; and anyone taking medications their clinician has flagged as sensitive to herbal products.

One more honest note: extremely high intakes are uncharted territory. Animal studies using very concentrated spearmint over long periods found changes in liver and kidney tissue at amounts far beyond normal tea drinking. That’s a reason for moderation, not alarm: the same could be said of nutmeg, licorice, or most kitchen staples taken to extremes.

Does spearmint tea lower testosterone in men?

This question comes up constantly, usually in a worried tone, and the evidence is thinner than the worry. The human trials measuring testosterone reduction were conducted entirely in women with elevated androgens. There are no published clinical trials measuring what regular spearmint tea does to hormone levels in men.

What exists is indirect: the original clinical observation about heavy mint-tea drinkers reporting reduced libido, plus rodent studies in which large amounts of spearmint were associated with lower testosterone and testicular tissue changes. Rodent doses in these studies tend to be enormous relative to a human sipping a mug, and rodents are famously not people, plenty of findings in rat endocrinology have never translated.

A sensible reading: an occasional cup of spearmint tea is very unlikely to move the needle on a man’s hormones in any noticeable way. Whether multiple daily cups over months would matter is genuinely unknown: the study simply hasn’t been done. Men who are actively managing low testosterone, fertility concerns, or athletic performance and who feel cautious about that uncertainty can reasonably choose a different herbal tea; rooibos and chamomile carry no such question mark.

What nobody should do is the inverse experiment: using spearmint tea deliberately as a hormone intervention, for any gender, without medical guidance. Hormones are a system, not a dial, and self-experimenting on a system you’re not measuring is guesswork with extra steps.

Spearmint tea vs. peppermint tea: what's the difference?

They share a genus, a tea-aisle shelf, and a reputation for settling stomachs, but the two mints diverge in ways that matter for choosing between them. Peppermint is the more-studied sibling overall, particularly for digestive complaints, while spearmint owns the hormone research, thin as it is.

	Spearmint	Peppermint
Key compound	Carvone	Menthol
Flavor	Sweet, mild, “chewing gum” mint	Sharp, cooling, intense
Caffeine	None	None
Best-studied use	Lowering androgens in women (2 small trials)	Digestive symptoms, mostly via peppermint oil research
Hormone research	Preliminary human evidence	Essentially none
Reflux caution	Yes, mint can worsen heartburn	Yes, and likely stronger given menthol content

As for the perennial search querywhat happens if I drink peppermint tea every day?the answer parallels spearmint’s: for most people, daily peppermint tea is a safe, caffeine-free habit. The strongest digestive evidence involves concentrated peppermint oil studied for irritable bowel symptoms, not the tea, so a brewed cup delivers a much gentler version of whatever menthol does. The main daily-drinker caveat is reflux: menthol can relax the lower esophageal sphincter, the valve keeping stomach acid where it belongs, so people prone to heartburn sometimes find peppermint makes evenings worse rather than better.

Flavor, honestly, is a fine tiebreaker. If you’re chasing the hormone research specifically, though, the studies used spearmint: the two are not interchangeable in that regard.

Can I drink spearmint tea at night?

Yes, and evening may be the most sensible slot for it. Because spearmint contains no caffeine, it sidesteps the sleep-fragmenting effect of black, green, and oolong teas, all of which come from the caffeinated tea plant. For context, MedlinePlus notes that caffeine can disturb sleep when consumed within hours of bedtime; a true herbal infusion carries none of that risk.

Does spearmint actively promote sleep? Here the evidence gets vaporous. Mint teas are often marketed as calming, and the warm-mug ritual itself has genuine value: a consistent wind-down cue is a legitimate piece of sleep hygiene, whatever’s in the cup. But there are no solid clinical trials showing spearmint specifically improves sleep quality or shortens the time it takes to fall asleep. If a sedating herbal effect is what you’re after, chamomile has at least some supportive (if modest) research; spearmint is better described as sleep-neutral.

Two practical notes for night drinkers. First, any large volume of fluid right before bed is a scheduled 3 a.m. bathroom trip, finish your cup an hour or so before lights out. Second, if you have reflux, nighttime is exactly when mint’s sphincter-relaxing tendency bites hardest, since lying flat lets acid travel. Nighttime heartburn after a minty cup isn’t a coincidence; swap in a non-mint herbal tea and see if it settles.

Does spearmint tea help digestion and bloating?

Mint’s stomach-settling reputation is ancient, and there’s a kernel of pharmacology underneath it: compounds in mint, including spearmint’s carvone, show antispasmodic activity in laboratory studies, meaning they can relax smooth muscle of the kind that lines the gut. Relaxed gut muscle, in theory, means less cramping and easier passage of gas, hence the after-dinner mint tea tradition across many cultures.

The catch is that most of the credible digestive research involves peppermint, and specifically concentrated peppermint oil in coated capsules studied for irritable bowel syndrome: a very different animal from a brewed cup of spearmint. Trials testing spearmint tea itself for bloating, indigestion, or nausea are scarce to nonexistent. So the honest verdict is: mechanistically plausible, traditionally beloved, clinically unverified.

That said, the practical bar here is low. A warm, unsweetened beverage after a heavy meal is a reasonable habit regardless of botany, warmth alone can ease the sensation of fullness, and choosing tea over a sweetened soda or dessert helps digestion in the most boring, effective way possible. If gentle relief happens, enjoy it; just don’t expect a brewed leaf to fix a persistent problem.

The important exception, once more, is reflux. The same muscle-relaxing property that might ease a crampy gut can loosen the valve at the top of the stomach. If your “digestion issue” is actually heartburn, mint teas frequently make it worse: a distinction worth knowing before you double down on the very thing aggravating you.

What about the antioxidants everyone mentions?

Every spearmint listicle leans hard on the word “antioxidants,” so let’s define what’s actually in the cup and what it can honestly claim. Spearmint leaves are rich in polyphenols, chiefly rosmarinic acid, along with flavones and phenolic acids. In lab settings, these compounds neutralize free radicals, reactive molecules implicated in cellular wear and tear. That much is chemistry, and it’s true.

The leap that marketing makes, antioxidants in a cup, therefore protection from disease in a body, is where the evidence thins dramatically. Decades of research on antioxidant supplements have taught a humbling lesson: isolated antioxidant intake rarely delivers the disease prevention that test-tube data implies. Antioxidant-rich dietary patterns (plenty of vegetables, fruits, legumes, teas) are associated with better health; individual antioxidant sources are almost never proven to move outcomes on their own.

Two small human studies deserve honest mention because they’re often garbled in retellings. One trial gave adults with knee osteoarthritis a specially bred, high-rosmarinic-acid spearmint tea for 16 weeks and found modest improvements in pain scores versus regular spearmint tea, interesting, small, and involving a cultivar you can’t buy at the supermarket. Another tested a concentrated proprietary spearmint extract in older adults with age-related memory complaints and reported small gains on some cognitive measures. Extract findings do not transfer to brewed tea; the concentrations differ enormously.

The fair summary: spearmint tea is a perfectly good contributor to an antioxidant-rich diet, in the way that berries or green vegetables are. It is not a shield, a brain tonic, or a joint treatment based on current evidence.

How much did the studies use, and how do you brew a proper cup?

Both hormone trials kept things remarkably ordinary: participants drank spearmint tea twice a day, brewed simply from spearmint leaves steeped in freshly boiled water for several minutes. No extracts, no capsules, no ceremony. If you’re curious to replicate the habit, that’s the pattern the research actually used, two ordinary cups, morning and evening, made from a tea whose ingredient list reads “spearmint” and stops there.

A few brewing notes from the food-science side:

• Cover the cup while it steeps. Mint’s aromatic compounds, including carvone, are volatile: they literally leave with the steam. A lid or saucer keeps more of them in your tea and less in your kitchen air.
• Steep five minutes or longer. Herbal infusions are forgiving; unlike green tea, spearmint doesn’t turn bitter with time, and longer steeping extracts more polyphenols.
• Fresh leaves work beautifully. A small handful of garden spearmint, lightly crushed, makes a brighter cup than most tea bags. Spearmint is famously easy to grow, aggressively easy, as anyone who’s planted it outside a pot has learned.
• Skip the sugar. Sweetening a “health” tea into a dessert quietly cancels its best feature. If you need contrast, a squeeze of lemon adds brightness without the sugar load.

Iced spearmint tea, brewed strong and chilled, is one of summer’s better sugar-free drinks, and every cup that displaces a soda is doing quiet, unglamorous, well-documented good.

Who should be cautious with spearmint tea?

“Natural” and “harmless” are not synonyms, and even a gentle herb has a short list of people who should think twice or check first.

• People with acid reflux or GERD. The recurring theme of this article: mint can relax the lower esophageal sphincter and aggravate heartburn. If reflux is part of your life, spearmint tea may be working against you, especially near bedtime.
• People who are pregnant or breastfeeding. An occasional cup is unlikely to be a problem, but large, regular amounts haven’t been studied for safety in pregnancy, and some animal data at high intakes raised questions. This is a classic “ask your prenatal clinician” situation: a thirty-second conversation, well spent.
• People with kidney or liver disease. Very high intakes of spearmint caused organ tissue changes in animal studies. Normal tea drinking hasn’t been linked to harm in humans, but anyone with existing kidney or liver conditions should keep herbal habits on their care team’s radar.
• Anyone on hormone-related treatment. If you’re being treated for a hormonal condition, undergoing fertility care, or taking hormone therapy of any kind, an herb with demonstrated (if modest) anti-androgen activity is worth disclosing. It probably doesn’t matter; “probably” is a word clinicians like to verify.
• People with known mint allergies, who exist, though rarely, itching or swelling after mint is a reason to stop and get evaluated.

None of this makes spearmint dangerous. It makes it a real substance with real, if mild, biological activity, which is precisely why it’s interesting in the first place.

When to see a doctor instead of the tea aisle

The symptoms driving spearmint’s popularity, irregular periods, stubborn hormonal acne, unwanted facial or body hair, unexplained hair thinning, are exactly the symptoms that deserve a proper workup, because they can signal conditions that respond far better to diagnosis than to tea.

Make an appointment if you notice:

• Menstrual cycles that are consistently absent, longer than 35 days apart, or newly erratic
• Rapid onset or worsening of coarse facial or body hair, especially with acne or scalp hair loss
• Moderate to severe acne, acne that scars, or acne that hasn’t budged after months of over-the-counter care
• Unexplained weight change, fatigue, or mood shifts alongside any of the above
• Difficulty conceiving after trying for a year (or six months if you’re over 35)

These patterns can point toward PCOS, thyroid disorders, or other endocrine conditions, all of which are diagnosed with straightforward blood tests and, per Mayo Clinic guidance, managed most effectively when caught early. PCOS in particular carries long-term considerations, including elevated risks for type 2 diabetes and cardiovascular issues, that no beverage addresses.

Self-treating a hormonal symptom with tea for a year, only to learn the underlying condition was quietly progressing, is the genuinely costly path. Get the labs. Then, if you and your clinician agree, let spearmint be the pleasant sidekick: an inexpensive, low-risk habit layered on top of real answers, never standing in for them.

The bottom line: a pleasant habit with one genuinely interesting footnote

Strip away the algorithm-fueled hype and spearmint tea earns a fair, modest verdict. It’s a caffeine-free, sugar-free, hydrating drink, already a win in a beverage landscape crowded with liquid dessert. It tastes good hot or iced. And it carries one legitimately intriguing scientific footnote: two small trials showing real, measured reductions in androgens among women with elevated levels, an effect almost no other supermarket herb can claim with human data behind it.

What it isn’t: an acne treatment (untested), a sleep aid (unproven), a men’s-health hazard at casual intakes (unstudied, but implausible from a cup here and there), or a substitute for diagnosing why your hormones feel off in the first place.

If the research community ever funds the longer, larger PCOS trial that the 2010 authors called for, this footnote could grow into a genuine chapter. Until then, the most evidence-honest way to enjoy spearmint tea is also the most pleasant one: as a daily ritual you’d happily keep even if it did nothing at all, with any hoped-for hormone benefit treated as a possible bonus, discussed openly with the clinician who actually knows your labs.

Frequently asked questions

What happens if I drink spearmint tea every day?

For most healthy adults, daily spearmint tea is a safe, caffeine-free hydration habit with no expected downsides. In women with elevated androgens, small trials suggest measurable drops in free testosterone within days to weeks of drinking two cups daily. People with acid reflux may notice more heartburn, since mint can relax the valve above the stomach. It won’t detox, burn fat, or cure any condition: those claims have no evidence behind them.

Is spearmint tea good for female hormones?

There is preliminary evidence that it can lower androgens in women who have elevated levels. Two small trials, one in women with hirsutism, one in women with PCOS, found reduced free testosterone and increased LH and FSH after twice-daily spearmint tea. The studies were tiny and short, and no large trial has confirmed the effect, so it’s a promising signal rather than proof. Hormonal symptoms still warrant proper lab testing with a clinician.

Is spearmint tea good for PCOS?

It may help modestly with the elevated androgens that drive some PCOS symptoms, based on one 30-day randomized trial of 42 women showing lower free and total testosterone versus placebo tea. Visible hair-growth scores didn’t change in that short window, and no long-term trial exists. Spearmint tea is reasonable as a low-risk addition to a medically supervised PCOS plan, but it is not a treatment for the condition on its own.

Can I drink spearmint tea at night?

Yes, spearmint tea contains no caffeine, so it won’t disrupt sleep the way black, green, or oolong tea can. There’s no solid evidence it actively promotes sleep, but a warm, caffeine-free cup makes a fine wind-down ritual. Finish it an hour before bed to avoid overnight bathroom trips, and skip it if you have reflux, since lying down after mint can trigger nighttime heartburn.

What happens if I drink peppermint tea every day?

Daily peppermint tea is generally safe for most adults and, like spearmint, contains no caffeine. Its digestive reputation rests mostly on studies of concentrated peppermint oil rather than brewed tea, so expect gentler effects at best. The main caveat is heartburn: menthol can relax the lower esophageal sphincter, so daily peppermint sometimes worsens reflux. Peppermint has essentially no hormone research behind it: the androgen studies used spearmint specifically.

Does spearmint tea help with hormonal acne?

Unproven. No clinical trial has tested spearmint tea for acne. The claim is an inference: androgens increase skin oil production, spearmint lowered androgens in two small trials, therefore it might help androgen-driven breakouts. That chain is plausible but unverified. If you enjoy the tea, a two-to-three-month trial is low risk, but moderate, severe, or scarring acne deserves evaluation by a dermatologist, where proven treatments exist.

Does spearmint tea lower testosterone in men?

Unknown: the human trials were conducted only in women with elevated androgens. Rodent studies using very large amounts of spearmint showed reduced testosterone, but those doses far exceed normal tea drinking and animal findings often don’t translate. An occasional cup is very unlikely to matter. Men with fertility or hormone concerns who prefer zero uncertainty can simply choose a different herbal tea, such as rooibos or chamomile.

How much spearmint tea did the hormone studies use?

Two cups a day, brewed simply from spearmint leaves steeped in boiled water for several minutes. The 2007 hirsutism study ran five days during the follicular phase of the cycle; the 2010 PCOS trial ran 30 days with tea taken morning and evening. Neither used extracts or concentrated products, just ordinary tea, which makes the habit easy to replicate but also means the evidence covers only these short timeframes.

Is spearmint tea safe during pregnancy?

An occasional cup is generally considered low risk, but large, regular amounts haven’t been well studied in pregnancy, and some animal research at very high intakes raised questions. Given that spearmint has demonstrated mild hormonal activity, the prudent move is to keep intake modest and mention it to your prenatal clinician, who can weigh it alongside everything else you’re consuming. The same caution applies while breastfeeding.

What's the difference between spearmint tea and peppermint tea?

Chemistry and evidence. Spearmint’s dominant compound is carvone, giving a sweet, mild flavor; peppermint is rich in menthol, giving that sharp cooling blast. Both are caffeine-free. Peppermint has more digestive research behind it (mostly as concentrated oil), while spearmint holds the small human trials on lowering androgens in women. If you’re drinking tea because of the hormone studies, spearmint is the one they actually tested.

References

• MedlinePlus: Polycystic Ovary Syndrome
• MedlinePlus: Caffeine

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.