Menopause
Do menopause supplements work?
Reviewed by a qualified clinician · analysed at UKAS-accredited UK labs (ISO 15189)
Last reviewed August 20267 min read
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The three best-selling menopause botanicals have weak or mixed trial evidence for hot flushes. Black cohosh failed to beat placebo in a Cochrane review of 16 trials, and UK regulators require a liver warning on it. Before you spend, it is worth seeing where your hormones and thyroid actually sit.
You are in front of the menopause shelf, and every box promises calm, cool nights. Black cohosh. Siberian rhubarb. Red clover. Thirty pounds a month, and no way to tell which one is doing anything.
Menopause-support botanicals are one of the fastest-growing supplement categories going into 2026. The evidence has not moved with the sales. As of August 2026, the major reviews still land in the same place, and it is not where the packaging suggests.
By Helvy Medical Team · 7 min read
1. What does the evidence show?
Start with the biggest seller. Black cohosh is the most purchased botanical for menopause symptoms. The 2023 nonhormone therapy position statement of The North American Menopause Society reviewed it and was blunt.
“At this time, there is insufficient evidence to support the use of black cohosh for VMS.”
— The 2023 Nonhormone Therapy Position Statement, The North American Menopause Society (VMS means hot flushes and night sweats)
That reading rests on a 2012 Cochrane review of 16 randomised trials in 2,027 women. The median dose was 40 mg a day, taken for an average of 23 weeks. There was no significant difference between black cohosh and placebo in how often hot flushes happened.
Siberian rhubarb (ERr 731) is the newer arrival, and the one you will see marketed hardest. Its main trial randomised 109 perimenopausal women and did report better symptom scores at 12 weeks. The problem is who finished. Only 7 of the 55 women on placebo completed it, a retention rate of 12.7%. The 2023 statement called the conclusions limited and did not recommend it.
Red clover supplies isoflavones, the plant compounds that loosely resemble oestrogen. The 2013 Cochrane review of phytoestrogens pooled 43 trials in 4,084 women. Its best red clover trial, 252 women on Promensil or Rimostil, found no significant change in hot flush frequency against placebo.
UK guidance sits a shade softer, and it is worth quoting fairly. NICE guideline NG23 says there is some evidence that isoflavones or black cohosh may relieve hot flushes and night sweats. It then adds the catch: many preparations exist, their safety is uncertain, strengths vary, and interactions with other medicines have been reported.
2. Is black cohosh safe?
This is the part the shelf does not say out loud. UK regulators looked at reports of liver injury and acted.
“The available evidence supports an association between black cohosh and risk of hepatotoxicity.”
— MHRA UK Public Assessment Report, Black cohosh and liver injury (hepatotoxicity means liver damage)
The reactions reported worldwide ran from abnormal liver-function tests and jaundice through to hepatitis and liver failure needing a transplant. Serious cases are rare. That is why UK black cohosh products now carry a liver warning on the pack, and why a history of liver disease rules it out.
Rare is not the same as impossible, and liver strain is measurable before you feel it. Our guide to herbal supplements and liver damage covers which ones show up most often, and the liver function test guide explains what ALT and GGT are telling you.
3. What is worth checking first?
Be clear about what a blood test can and cannot settle here. If you are 45 or over with typical symptoms, NICE says menopause is identified from your symptoms alone. No test needed. Our hot flushes guide explains that rule in full.
Testing earns its place for two other reasons.
- The look-alikes. An overactive thyroid causes the same heat, sweating and racing pulse
- Your age. Under 45, an FSH result genuinely helps and can point to early menopause
Both matter before you commit to a supplement routine. If the heat is thyroid rather than hormones, no botanical on that shelf is aimed at the right thing. Our guide on telling menopause and thyroid apart walks through the differences.
Our Hormone Balance panel (£99) measures FSH, LH, SHBG, total testosterone and the free androgen index from one home finger-prick sample. Two honest limits. It does not include oestradiol, so if you want oestrogen tracked directly, that is a GP conversation. And FSH swings during perimenopause, so one reading is a snapshot, not a verdict.
One more thing changes around the last period, and it is not on the supplement shelf either. LDL and ApoB tend to climb as oestrogen falls. A cholesterol check in your fifties is usually worth more than another month of herbs.
4. What does have evidence behind it?
The 2023 statement did not reject everything. It reviewed the nonhormone options and backed cognitive behavioural therapy and clinical hypnosis for hot flushes. Both are drug-free. Neither is sold in a tub.
The NHS suggests keeping rooms cool, dressing in layers, regular exercise and easing back on caffeine, alcohol and spicy food. Dull advice. It costs nothing, and it has more behind it than red clover does.
Where symptoms disrupt daily life, the NHS describes HRT as the main treatment for menopausal symptoms. Whether it suits you depends on your history and preferences, and that is a conversation for your GP or a menopause specialist. Walking in with your thyroid and hormone numbers already in hand makes it a shorter one.
CHECK YOUR HORMONES
The Hormone Balance panel (£99) reads FSH, LH, SHBG, testosterone and the free androgen index from a simple home sample, with a clear explanation of every result. Build the test that fits you in two minutes.
5. Frequently asked questions
Does black cohosh help hot flushes?
The trial evidence does not support it. A Cochrane review of 16 trials in 2,027 women found no significant difference from placebo in hot flush frequency, and the 2023 Menopause Society statement says there is insufficient evidence to support its use. NICE notes some evidence of benefit but warns that safety and strength vary between preparations.
Is black cohosh safe for the liver?
UK regulators concluded the evidence supports an association with liver toxicity, which is why packs carry a liver warning. Serious cases are rare, but reported reactions have included jaundice, hepatitis and liver failure. It is not suitable if you have a history of liver disease, and any yellowing of skin or eyes needs urgent medical advice.
Does red clover work for menopause symptoms?
The best evidence says no clear effect. In the 2013 Cochrane review of phytoestrogens, a good-quality trial of 252 women comparing two red clover extracts against placebo found no significant change in how often hot flushes happened. Short-term use did not show harmful effects either.
Is Siberian rhubarb (ERr 731) worth trying?
Its supporting trial reported better symptom scores, but only 12.7% of the placebo group finished the study. That level of drop-out makes the result hard to trust. The 2023 Menopause Society statement reviewed it and did not recommend it.
Should I get a blood test before taking menopause supplements?
It depends on your age. Over 45 with typical symptoms, NICE says menopause is identified from symptoms alone. Testing still helps rule out look-alikes such as an overactive thyroid, and under 45 an FSH result genuinely matters. Our menopause blood test guide covers the timing.
Medical disclaimer: This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment. Guidance and thresholds cited here are based on NICE, NHS, MHRA and published research, and may differ from the ranges used by your local laboratory. Do not start, stop or change medication, HRT, supplementation or treatment based solely on information in this article; consult your GP or a qualified healthcare professional. All Helvy blood tests are processed by UKAS-accredited UK laboratories to ISO 15189.
Last updated: August 2026 · By Helvy Medical Team · Analysed at UKAS-accredited UK laboratories
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