Which Menopause Supplements Have Evidence? An Honest Review

No menopause supplement has evidence strong enough for a UK health claim, and the trials show why: soy isoflavones modestly reduce hot flush frequency, black cohosh and red clover give inconsistent results, evening primrose oil does nothing measurable for flushes, and the supplements with the clearest case, vitamin D and calcium, are for bone, not symptoms.^{1, 2, 3} That is not a reason to feel short-changed. The effective treatment for menopause symptoms is hormone replacement therapy, available on the NHS, with non-hormonal medicines and cognitive behavioural therapy as alternatives, and supplements sit around that as nutrition for a body whose needs shift at this stage: bone, muscle, iron until periods stop, B12 as absorption declines. This review goes through the common supplements one by one, says what each has shown, and keeps to what can be said.

• Some evidence for flushes: soy isoflavones, modest effect over weeks; possibly sage, small trials
• Inconsistent: black cohosh, red clover, St John's wort (and it interacts with many medicines)
• No measurable effect on flushes: evening primrose oil, vitamin E, omega-3, magnesium
• Clear case, for bone not symptoms: vitamin D 10 micrograms, calcium 700 mg from food, protein, resistance exercise
• Effective treatments: HRT, some non-hormonal prescription medicines, CBT; all via your GP

Why no supplement can claim to help the menopause

In the UK a food supplement may state a health benefit only if that benefit is on the register of authorised claims, and no claim about menopause symptoms has been authorised for any ingredient, because the evidence submitted did not establish cause and effect. Products that say "for menopause" on the front rely on the implication; the nutrients inside may carry their own authorised wording, such as vitamin B6 contributing to the regulation of hormonal activity, which describes a biochemical role and not a symptom effect. This page can describe trial results and does. It does not recommend any supplement as a treatment, and anyone with troublesome symptoms should start with their GP, where the effective options live.

What the trials show, supplement by supplement

Soy isoflavones. The best-studied. A systematic review of randomised trials found that isoflavone supplements reduced hot flush frequency by around 20% and severity by around 26% more than placebo, over 6 to 12 weeks, with the effect building slowly and larger in people whose gut bacteria produce a compound called equol.¹ It is a real but modest effect, a fraction of what HRT achieves, and the trials varied in quality. Soy foods, tofu, edamame, soya milk, are the diet route and are what Japanese women, whose lower flush rates are often cited, actually eat. Women with a history of oestrogen-sensitive breast cancer should ask their oncologist before taking isoflavone supplements.

Black cohosh. The Cochrane review found insufficient evidence to support it for menopause symptoms, with trials conflicting and many poor; a 2022 menopause society statement reached a more favourable view for some preparations but still short of a claim, and liver injury has been reported rarely.² Online it is sometimes described as "a magnesium supplement"; it is a plant extract and nothing to do with magnesium.

Red clover. Also an isoflavone source; trials are mixed and mostly small, with no consistent benefit.

St John's wort. Some evidence for mood and, in combination with black cohosh, for flushes, but it interacts with the contraceptive pill, antidepressants, anticoagulants and many other medicines and is not something to take without pharmacist advice.

Sage. A few small trials suggest fewer flushes; promising, unproven.

Evening primrose oil. Trials show no measurable effect on hot flushes against placebo despite its long reputation.

Vitamin E, omega-3, magnesium. No consistent effect on flushes in trials. Omega-3 and magnesium have their own authorised roles and may be worth taking for other reasons; not for flushes.

Maca, ashwagandha, probiotics, collagen. Small or no trials for menopause symptoms; marketing runs ahead of evidence. Collagen trials show benefits for skin elasticity that are relevant to any woman in her fifties and are covered in our collagen guides, not a menopause effect.

The supplements with a clear case at the menopause

They are about bone and nutrition, not flushes. Bone loss accelerates in the years around the menopause as oestrogen falls, and the inputs that slow it are vitamin D, calcium, protein and resistance exercise.³ Vitamin D at 10 micrograms a day from October to March for everyone, all year for those indoors; vitamin D contributes to the maintenance of normal bones and normal muscle function. Calcium at 700 mg a day from food, with a supplement only to close a gap; foods high in calcium shows how. Magnesium and vitamin K contribute to the maintenance of normal bones too. Iron matters while periods continue, especially if they are heavier in the transition, and should stop being supplemented once they end unless a test says otherwise; iron and heavy periods explains the test. B12 absorption falls from the mid-sixties, and B12 for women covers why a supplement becomes sensible then. A multivitamin designed for women over 50, iron out and B12 and D in, is a reasonable hedge for a narrowing diet; how to choose a multivitamin for women explains what to look for.

What vitamins should a woman take during menopause?

Vitamin D, as above. B12 if over 65, vegan or on metformin. Calcium from food. Everything else only if diet or a test shows a gap. The "top 3 vitamins for menopause" and "number one menopause supplement" searches have no honest answer beyond that, because the symptoms people mean, flushes, sleep, mood and brain fog, respond to HRT and to sleep, exercise and CBT, not to a vitamin. Sleep and mood do deserve a check for iron, B12, thyroid and vitamin D, because deficiency symptoms hide behind the menopause and are fixable.

The treatments that work

HRT is the most effective treatment for hot flushes, night sweats, sleep disturbance, mood changes and vaginal symptoms, and NHS guidance since 2015 supports it for most women under 60 or within ten years of the menopause, with the risks and benefits discussed individually. Non-hormonal prescription options exist for women who cannot or do not want to take HRT. Cognitive behavioural therapy reduces the impact of flushes and improves sleep in trials. Exercise, weight management, cutting alcohol and caffeine, and keeping bedrooms cool help. The best line on the forums is that HRT is the correct supplement; it is a prescription conversation, and this page is not a substitute for it.

The weight angle

"Best menopause supplements for weight loss" is a rising search and we decline it. No supplement produces weight loss at the menopause, the metabolic changes are real and respond to protein, resistance exercise and sleep, and anything sold for "menopause belly" is selling the anxiety. Wellgard's women's 50+ multivitamin gummies are built for the nutrition pattern above, iron out and vitamin D and B12 in; the vitamin D in them contributes to the maintenance of normal bones and teeth and the B12 to the reduction of tiredness and fatigue. They carry no menopause claim, because none is authorised.

What we don't know

• Whether soy isoflavones help women who do not produce equol. The effect is smaller or absent in trials; about a third of Western women produce it.¹
• Which black cohosh preparations, if any, work. Standardisation varies and the evidence conflicts.²
• Whether sage holds up in larger trials.

Frequently asked questions

Which menopause supplements actually work?

None is proven to treat symptoms and none may claim to. Soy isoflavones modestly reduce hot flushes in trials; vitamin D and calcium have a clear case for bone. HRT is the effective treatment.^{1, 3}

Do menopause supplements help hot flushes?

Soy isoflavones reduce them by roughly a fifth in frequency in pooled trials; black cohosh and red clover are inconsistent; evening primrose does not. HRT and CBT are far more effective.^{1, 2}

Is magnesium good for menopause?

Not for flushes, where trials show no effect. It contributes to the maintenance of normal bones and normal muscle function, which matter at this stage, and what magnesium is good for covers it.

What do Japanese women use for menopause?

Mostly a diet high in soy foods, which supplies isoflavones; lower reported flush rates are also cultural and dietary. Soy foods are the sensible way to try the same.

What vitamins should a woman take during menopause?

Vitamin D from October to March, B12 if over 65 or vegan, calcium from food, and others only where diet or a test shows a gap.

Sources

1. Taku K, et al. Extracted or synthesized soybean isoflavones reduce menopausal hot flash frequency and severity: systematic review and meta-analysis of randomized controlled trials. Menopause, 2012. PubMed 22433977.
2. Leach MJ, Moore V. Black cohosh (Cimicifuga spp.) for menopausal symptoms. Cochrane Database of Systematic Reviews, 2012. PubMed 22972105; Castelo-Branco C, et al. Black cohosh efficacy and safety for menopausal symptoms: the Spanish Menopause Society statement. Gynecological Endocrinology, 2022. PubMed 35403534.
3. The North American Menopause Society. Management of osteoporosis in postmenopausal women: the 2021 position statement. Menopause, 2021. PubMed 34448749.
4. NHS. Menopause: treatment. nhs.uk.

This article is general information, not medical advice. Menopause symptoms that affect your life deserve a GP appointment, where HRT, non-hormonal medicines and CBT can be discussed; women with a history of breast cancer should ask their oncologist before taking isoflavones or any menopause supplement.