Natural relief for hot flashes has been tested, and the results split three ways. Cognitive behavioural therapy and clinical hypnosis have randomised trial support. Black cohosh, evening primrose oil, maca and soy have been tested and mostly failed. Most of the supplement aisle has never been properly tested at all.
Which remedies have actually been tested, and what happened?
Search this and the answers arrive in the same order every time: herbs first, lifestyle second. That order is backwards. It puts the least tested things at the top of the page and the best tested things below the fold, and it leaves you standing in a shop aisle holding a box. So here is the same list reordered by evidence, with the strongest test each option has ever faced sitting next to it. If your flushes are mostly a night time problem, that has its own set of answers, and it is worth being sure what you are treating, because what a hot flash actually feels like varies more than the word suggests.
| Remedy | Strongest test it has faced | What that test found | 2023 verdict |
|---|---|---|---|
| Clinical hypnosis | Randomised trial, 187 women, 2013 | Reported hot flash frequency fell 74% against 17% in an attention matched control arm | Level I, recommended |
| Menopause specific CBT | MENOS 1 and MENOS 2 trials, 2012 | Between 65% and 78% reached a meaningful drop in how much flushes bothered them | Level I, recommended |
| Weight loss | Behavioural weight loss trials, from 2015 | Fewer hot flashes reported, but on small or post hoc studies | Levels II to III, recommended |
| Black cohosh | Cochrane review of 16 trials, 2,027 women, 2012 | No significant difference from placebo in hot flash frequency | Level I, not recommended |
| Paced breathing | Randomised trial, 208 women, 2013 | No better than shallow breathing or usual care | Level I, not recommended |
| Evening primrose oil | Single trial, 56 women, six months, BMJ 1994 | Flushes fell by 1.0 a day on the oil and by 2.6 a day on placebo | Level II, not recommended |
| Soy foods and soy extracts | Many small trials reviewed to 2023 | Mixed, with several finding no benefit over placebo | Level II, not recommended |
| Soy metabolite equol | Systematic review of five trials, 2019 | Positive in three of five, most with fewer than 50 women per group | Level II, not recommended |
| Maca | Systematic review of four studies, 2011 | Improvements reported, but design and sample sizes too weak to rely on | Level II, not recommended |
| Dong quai | Randomised trial, 71 women, 24 weeks | No difference in hot flash frequency | Level II, not recommended |
| Ginseng | Randomised trial, 384 women, 16 weeks | No greater reduction than placebo | Level II, not recommended |
| Wild yam cream | One clinical trial of a yam cream | No significant benefit, and some tested creams were adulterated | Level II, not recommended |
| Acupuncture | Umbrella review of reviews and trials, 2018 | Beat no treatment, did not beat sham needling | Level II, not recommended |
| Yoga | Meta-analysis of 12 randomised trials, 2018 | No benefit against no treatment, limited benefit against exercise | Level II, not recommended |
| Exercise | Cochrane review, updated 2014 | Pooled, exercise had no effect on hot flash frequency | Level II, not recommended |
| Ashwagandha | One eight week trial, 91 women, 2021 | A global symptom score improved, with no hot flash diary used | Not assessed in the 2023 review |
Why do the same four herbs top every list?
Because they sell, and because the study that would settle the matter is old, small or missing. Black cohosh is the most purchased botanical for menopause symptoms and the largest thing ever done to it found nothing. Evening primrose oil rests on one trial from 1994 in which placebo won. Ashwagandha, the newest arrival, has a single eight week trial behind it that used a global symptom questionnaire rather than a hot flash diary. None of that makes these things fraudulent. It means nobody has shown they work for hot flashes, which is a very different sentence from the one on the label.
If the box says relief of hot flushes, does that mean it works?
No, and this is the single most useful thing on this page. In the UK a black cohosh product can carry that wording legally while having no evidence of effectiveness behind it, because of how the registration works. The Medicines and Healthcare products Regulatory Agency runs a Traditional Herbal Registration scheme, and its own guidance for business says it in one sentence: the permitted indications for the medicine are based on traditional usage and not on evidence of effectiveness of the product.
Read that again with a basket in your hand. The registration mark is real and worth having: the product is what it claims to be, made to a standard, with a proper patient leaflet. It is not a statement that the contents work. Traditional use is a claim about history, not about you.
What does the public advertising record show?
This is where the gap between the claims and the evidence stops being theoretical. The UK Advertising Standards Authority publishes every ruling it makes, and searching its database for menopause returns 19 rulings. Every one was upheld against the advertiser. They run from October 2022 to August 2026. Four that I read in full:
- Feel Holdings Ltd, ruled on 17 July 2024. A Facebook ad listed hot flushes among the symptoms the supplement targeted, with a testimonial reporting no more hot flushes. Upheld: for the purposes of the code, those were claims to treat disease.
- Happy Koala LLC, trading as MenoDaily, ruled the same day. The ad ran a day by day testimonial that reached Day 7 with no hot flashes and sleeping like a baby. Upheld.
- Femgroup Ltd, trading as Feminapause, ruled on 11 September 2024. The ad offered relief from night sweats and intense hot flashes and advertised a 95% success rate. Upheld on two counts, one of them for misleadingly implying official approval.
- Nova Relief, trading as Nova Menopause Vitality, ruled on 25 March 2026, the most recent of the group. The ad said the product could restore oestrogen production naturally and served as an alternative to HRT. The advertiser did not respond to the regulator at all. Upheld.
Nineteen rulings, nineteen upheld, nothing going the other way. The limits of that record matter as much as the pattern. Not all 19 concern menopause supplements, since the search also catches devices and drinks; an upheld ruling is a finding about an advertisement, not proof that a product does nothing; and none of it tells you what happened to any individual woman who took any of these. What is striking is that the regulator and the evidence reviewers arrived at the same place from opposite directions, one reading trials and the other reading advertising law. The regulator’s own guidance explains the bar: claims to treat or help the symptoms of the menopause are unlikely to be acceptable for foods and food supplements, because the legal definition of disease is wide enough to include them.
Where do NICE and the Menopause Society disagree?
Openly, and on precisely the two things you were probably about to buy. NICE guideline NG23, recommendation 1.4.7, tells clinicians to explain that there is some evidence isoflavones or black cohosh may relieve vasomotor symptoms, while warning that preparations vary, their safety is uncertain and interactions have been reported. The Menopause Society’s 2023 position statement reached the opposite conclusion and graded black cohosh Level I, not recommended.
Which to believe depends on a detail neither page usually mentions. The NICE recommendation is tagged 2015 and was not revisited when the guideline was last updated on 15 April 2026. The position statement reviewed everything published since 2015. So this is less two expert panels reading one pile of evidence differently, and more one recommendation being eleven years older than the other. Both were still standing as written when this page was checked on 23 September 2026.
What does have randomised evidence behind it?
Two things, and both are talking therapies rather than tablets, which is a genuinely irritating answer if you came here for something you could buy on the way home.
Clinical hypnosis has the most striking number in the field. In a 2013 randomised trial of 187 postmenopausal women, the hypnosis group reported a 74% fall in flash frequency against 17% in a control arm matched for therapist time and attention, and flashes measured by monitor rather than memory fell 57% against 10%. A follow up analysis found the result was not explained by whether women expected it to work.
Menopause specific cognitive behavioural therapy is the other, and it is the one non hormonal option NICE added at its 2024 update: recommendation 1.5.2 says to consider it for vasomotor symptoms, alongside HRT, or where HRT is unsuitable, or for those who would rather not take it. In the MENOS trials, group and self guided CBT reduced how much flushes were rated as a problem, and the improvement held at 26 weeks. Note what that outcome is. CBT changes what the flushes cost you rather than switching them off, which sounds like a consolation prize until you notice it is the thing that was actually measured, and that plenty of women find the real damage is done at 3am by something that is not heat at all.
Weight loss carries a weaker recommendation, Levels II to III, resting on small trials and post hoc analyses, with a hint that it matters more earlier in the transition than later. Non hormonal prescription options exist as well, including one NICE added to NG23 for use when HRT is unsuitable. Those are a conversation with a clinician who knows your history, not something to pick off a web page.
Is black cohosh safe?
For most people, probably, with one caveat worth knowing first. The Medicines and Healthcare products Regulatory Agency reviewed reports of liver injury and published a UK Public Assessment Report. Of 21 UK reports of liver reactions received up to 31 March 2006, 14 described an association between black cohosh and adverse effects on the liver, and 13 of the UK cases were reported as recovered or recovering after the product was stopped. Its expert committees concluded that the evidence supported an association with liver toxicity, while noting the level of risk is difficult to determine, and recommended that warnings be added to product information.
In the United States, the Pharmacopeial Convention reviewed 30 case reports possibly related to black cohosh and directed that products carry a warning to stop use and consult a practitioner in the event of a liver disorder or symptoms such as abdominal pain, dark urine or jaundice. The MHRA’s advice is that anyone who has previously had a liver complaint, or any other serious health complaint, should not take black cohosh without speaking to their doctor first. A product sold without a prescription is not the same as a product with nothing in it.
Frequently asked questions
Can black cohosh interact with other medicines?
NICE guideline NG23 tells clinicians to warn that interactions have been reported for isoflavones and black cohosh, and that preparations vary. It is more specific about St John’s wort, flagging potentially serious interactions with tamoxifen, anticoagulants and anticonvulsants. A pharmacist can check anything you already take against anything you are considering, and that check is free.
Is eating soy the same as taking a soy isoflavone supplement?
Not reliably. Soy’s possible effect on flushes is thought to depend on equol, a compound the gut makes from a soy isoflavone, and only about 35% of North American women can produce it. Tests to find out are not commercially available to the public or to clinicians, so the question cannot currently be answered for any individual.
Why did a supplement seem to work for me?
Because hot flash trials show unusually strong placebo responses, and because flushes fluctuate on their own. In the 1994 evening primrose trial the placebo group improved more than the treatment group. That is not a comment on anyone’s judgement. It is why trials need control arms, and why a real improvement you felt is still not evidence about what caused it.
Do cooling techniques and avoiding triggers help?
The 2023 review graded both Level II and recommended neither, because no randomised trials have tested them for hot flashes. That is an absence of evidence rather than evidence of absence. Layers, a cold drink and a fan cost nothing and harm nothing. They simply have not been shown to reduce how often flushes happen.
Is acupuncture worth trying?
The evidence has a consistent shape: acupuncture generally beats no treatment and generally does not beat sham needling, which is why the 2023 review graded it Level II. Researchers disagree about whether sham needling is a fair comparison, since it may not be physiologically inert, and trials of electroacupuncture have shown somewhat stronger results.
How long do hot flashes go on for?
Longer than most people are told. The 2023 position statement gives a mean duration of 7 to 9 years, and says that in about one third of women they last more than 10 years. Flushes can also start well before periods stop, which we cover in how long perimenopause lasts and in hot flashes while your periods are still arriving.
This article is general information, not medical advice, and is not a substitute for care from a qualified healthcare professional. Speak to your doctor about your own situation.
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