VITAMINS & SUPPLEMENTS · GUIDE
Menopause Supplement Blends: Black Cohosh, Soy Isoflavones and Others - Claims Checked
What menopause supplement blends contain, what reviews found for black cohosh, soy isoflavones and red clover, and the liver, cancer-history, pregnancy and medicine cautions.
Content last updated . This page has not been medically reviewed.
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Menopause blends usually mix plant extracts such as black cohosh, soy isoflavones and red clover with vitamins and minerals. They are often sold for hot flashes, night sweats and "hormone balance". The NHS (UK) says herbal remedies such as red clover and black cohosh are sometimes sold for menopause symptoms, but there is very little evidence on how well they work or how safe they are. [1] The FDA says it does not know if herbs or other "natural" products are helpful or safe for menopause symptoms. [2] For finished blends sold as products, Proper evidence not found in the sources we read (NHS, FDA, NCCIH, the National Institute on Aging, and Cochrane and other reviews on PubMed).Talk to a clinician about any change in periods or bleeding. [2] The North American Menopause Society (2023) said hormone therapy remains the most effective treatment for vasomotor symptoms (hot flashes and night sweats), and that supplements and herbal remedies were not recommended for these symptoms. [3] See perimenopause and menopause and black cohosh, soy, red clover and "hormone balance" claims.
Ingredient by ingredient
Amounts from trials are study amounts, not advice.| Ingredient | Form | What research covers | Label | Where covered |
|---|---|---|---|---|
| Black cohosh | Root or rhizome extract | A 2012 Cochrane review of 16 trials (2,027 women; oral black cohosh alone, median 40 mg a day, average 23 weeks) found no significant difference from placebo in hot flush frequency and said evidence was insufficient. [4] A 2023 review of 22 studies, cited by NCCIH, found extracts alone or with other herbs potentially beneficial for overall symptoms and hot flashes. [5] | Mixed | More about Black cohosh → |
| Soy isoflavones | Food, protein or concentrated extract | NCCIH says supplements or soy protein may reduce the frequency and severity of hot flashes, but the effect may be small and results were not completely consistent. [6] | Promising but limited | Same page |
| Red clover | Isoflavone extract | NCCIH says studies on hot flashes had inconsistent results and some had a high risk of bias. [7] | Mixed | Same page |
| Phytoestrogen products overall | Foods, extracts, supplements | A 2013 Cochrane review (43 trials) found no conclusive evidence that they reduce hot flushes or night sweats and noted a strong placebo effect. [8] A 2016 meta-analysis found modest reductions in hot flashes and vaginal dryness but not night sweats, and 74 percent of trials had a high risk of bias. [9] | Mixed | Same page |
| DHEA | Hormone-related supplement | The National Institute on Aging says black cohosh, DHEA and soy isoflavones for hot flashes are not proven to be effective, and some carry risks such as liver damage. [10] | Insufficient evidence | More about DHEA → |
A blend adds a second problem: the combination, form and amount in a given product have not been tested, even if each ingredient has been. The two black cohosh reviews counted different products: the Cochrane review looked only at black cohosh used alone, [4] while the 2023 review included extracts alone or with other herbs. [5]
Calcium, vitamin D and bone
Many menopause blends also contain calcium and vitamin D. NCCIH says soy isoflavones probably benefit bone density in postmenopausal women, [6] but that is separate from fracture prevention. See bone health formulas and osteoporosis and bone health.Frequently asked questions
Does black cohosh work for hot flashes?
Reviews disagree. A 2012 Cochrane review found no significant difference from placebo, [4] while a 2023 review cited by NCCIH found potential benefit. [5]
Are soy isoflavones a safe alternative to hormone therapy?
NCCIH says they may reduce hot flashes a little, with inconsistent results. [6] They are not a proven substitute; ask a clinician, especially with a breast cancer history.
Can black cohosh harm the liver?
Rare, sometimes serious cases of liver damage have been reported, and it is uncertain whether black cohosh was the cause. [5]
Do menopause blends work better than single ingredients?
Proper evidence not found. We found no trials comparing finished blends with single ingredients.
Are menopause supplements safe in pregnancy or after breast cancer?
NCCIH says black cohosh and red clover may not be safe in pregnancy or breastfeeding, and it is uncertain for hormone-sensitive cancer histories. [5] [7]
More details: evidence, limits and cautions
The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.
How to read the evidence labels
Labels used on this page: mixed, insufficient evidence, promising but limited, evidence of harm.
Safety: who should ask first
- Liver. NCCIH says cases of liver damage, some very serious, have been reported with products labeled as black cohosh. They are rare and it is uncertain whether black cohosh caused them. [5] It lists dark urine and fatigue as symptoms to report to a health care provider. [5] See liver safety.
- Wrong herb in the bottle. Some commercial black cohosh products were found to contain the wrong herb or unlisted mixtures. [5] Black cohosh and blue cohosh are different herbs. [5] See quality testing and certifications.
- Breast or uterine cancer history. It is uncertain whether black cohosh is safe for women who have had hormone-sensitive conditions such as breast or uterine cancer. [5] Soy supplements have not been shown to reduce breast cancer risk. [6] Ask the cancer care team before any menopause supplement.
- Pregnancy and breastfeeding. NCCIH says black cohosh and red clover may not be safe in pregnancy or while breastfeeding, and soy in amounts above those in food may be unsafe in pregnancy. [5] [7] [6] See pregnancy and breastfeeding.
- Medicines. The NHS says some herbal remedies may cause serious side effects with other medicines. [1] Soy foods high in tyramine have interacted with a class of antidepressants (MAO inhibitors), causing dangerously high blood pressure. [6] Ask a pharmacist and read medication interactions. Do not stop a prescribed medicine on your own.
- Soy allergy and side effects. Some people are allergic to soy; side effects can include bloating, constipation, diarrhea and nausea. [6]
- Surgery. Tell the surgical team about all products: supplements before surgery.
In the US, dietary supplements are not approved by the FDA before they are sold, NCCIH notes. [5]
References
- NHS (UK). Menopause: treatment. Page last reviewed 19 May 2026. Read 2026-10-23.
- US Food and Drug Administration. Menopause. Read 2026-10-23.
- North American Menopause Society. The 2023 nonhormone therapy position statement of The North American Menopause Society. Menopause 2023. Read 2026-10-23.
- Leach MJ, Moore V. Black cohosh (Cimicifuga spp.) for menopausal symptoms. Cochrane Database Syst Rev 2012. Read 2026-10-23.
- NCCIH (US). Black Cohosh. Last updated November 2024. Read 2026-10-23.
- NCCIH (US). Soy. Last updated April 2025. Read 2026-10-23.
- NCCIH (US). Red Clover. Last updated April 2025. Read 2026-10-23.
- Lethaby A et al. Phytoestrogens for menopausal vasomotor symptoms. Cochrane Database Syst Rev 2013. Read 2026-10-23.
- Franco OH et al. Use of Plant-Based Therapies and Menopausal Symptoms: A Systematic Review and Meta-analysis. JAMA 2016. Read 2026-10-23.
- National Institute on Aging (US). Hot flashes: what can I do?. Read 2026-10-23.