Herbs for PCOS and "Hormone Balance": Claims Checked
A claim check of herbs marketed for PCOS and hormone balance, covering spearmint tea, chasteberry and herbal formulas, what trials show, what health agencies list as treatment, and the limits.
Content last updated . This page has not been medically reviewed.
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The claim, as marketed
"This herb balances your hormones and treats PCOS naturally." Polycystic ovary syndrome (PCOS) is a hormone condition. The NHS now calls it polyendocrine metabolic ovarian syndrome (PMOS), saying PMOS used to be called PCOS, and notes it affects periods, hair growth, fertility and mood. [1] This page checks the claim against what trials and health agencies say. It is information, not treatment advice.Short answer
Proper evidence not found that any herb treats PCOS or "balances hormones" in general. There are a few small trials and low-certainty reviews. Searched: PubMed (spearmint, herbal medicine and PCOS reviews), NIH and NHS PCOS pages, and NIH chasteberry information. No herb is listed as a treatment on the NHS or NICHD pages we read. [1][2]Why not to rely on herbs alone
The NHS says PMOS has no cure but treatments and lifestyle changes can help, and lists the combined pill, progestogen-only pill or hormonal coil for irregular periods and metformin for tiredness and weight. [1] NICHD says oral contraceptives are the primary long-term option for those who do not want to become pregnant, and that many PCOS treatments are not FDA-approved specifically for PCOS. [2] The NHS says PMOS can raise the risk of serious conditions including non-alcoholic fatty liver disease, so regular check-ups matter. [1] Many PCOS symptoms are common and have many causes, so get them checked. [1] See PCOS.Claims and evidence
| Claim | What the source found | Strength of evidence | Form and people studied |
|---|---|---|---|
| Spearmint tea lowers male-type hormones and unwanted hair | A two-center trial randomized 42 volunteers to spearmint tea or placebo herbal tea for 30 days. Free and total testosterone fell, and self-rated hirsutism improved, but the objective hair score did not significantly change. The author said a longer study is needed. [3] A 2012 review said some evidence for spearmint tea in PCOS was beginning to emerge. [4] | Promising but limited (biomarker change; no clear clinical change) | Mentha spicata leaf tea, 42 women, 30 days [5][3] |
| "Many herbs improve PCOS" | A 2026 review of ten human studies (548 participants) named green tea, caraway, black mint tea, ginger, fennel, Nigella sativa and bitter olive, and said the studies differed too much to confirm the findings. [6] | Insufficient evidence | Mixed herbs, small trials |
| Chasteberry balances cycles | Proper evidence not found for PCOS. NIH's chasteberry page discusses PMS and does not list PCOS among studied uses; it says there is not enough reliable evidence for infertility, adding chasteberry may be unsafe during pregnancy. [7] | Insufficient evidence | Not applicable |
| Herbal formulas for PCOS fertility | A 2026 meta-analysis of a Chinese herbal formula (19 trials, 2,181 participants) found low to very low certainty, 73.7% of trials gave no adverse-event information, and organ toxicity could not be ruled out. [8] | Low-certainty for benefit; safety data insufficient | Formula used with conventional medicine |
A biomarker change (a hormone level) is not the same as a clinical result such as fewer symptoms or better fertility. Spearmint is Mentha spicata, the accepted GBIF name. [5] See spearmint, peppermint vs spearmint and black cohosh, soy, red clover and "hormone balance" claims.
Traditional use
Traditional use of these herbs for women's health is not described in the sources we read for this page. Traditional use is never proof of benefit.Frequently asked questions
Can herbs cure PCOS?
No source we read says so. The NHS says there is no cure, only treatments and lifestyle changes that can help. [1]
Does spearmint tea help PCOS?
One 30-day trial of 42 women found lower testosterone but no significant change in the objective hair score. [3]
What does "hormone balance" mean?
It is a marketing phrase with no single medical definition in the sources we read. Proper evidence not found for herbs that "balance" hormones in general.
Is chasteberry good for PCOS?
Proper evidence not found. NIH discusses PMS and says infertility evidence is insufficient. [7]
What should I do about symptoms?
Get irregular periods, excess hair growth or fertility concerns checked. [1]
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.
Safety
- Pregnancy and fertility: NICHD says it is important to discuss fertility goals with a provider when choosing treatments. [2] NIH says chasteberry may be unsafe during pregnancy. [7] Anyone trying to conceive should ask a clinician before using a hormone-active herb. See pregnancy and breastfeeding safety.
- Hormone-sensitive conditions: see herbs and hormone-sensitive conditions.
- Medicines: herbs can interact with the pill, metformin and other medicines; the sources we read for this page do not describe interactions for spearmint, so ask a pharmacist. See medicine interactions.
- Formulas and liver: multi-herb formulas combine many plants, and the review above found safety reporting was inadequate and organ toxicity could not be ruled out. [8] See quality testing.
- Surgery, children, kidney: not described in the sources we read.
- Never stop a prescribed medicine on your own; ask the prescriber or pharmacist.
References
- NHS (UK). Polyendocrine metabolic ovarian syndrome (PMOS), previously PCOS. Page last reviewed 30 June 2026. Read 2026-10-23.
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD, NIH). What are the treatments for PCOS? Read 2026-10-23.
- Grant P. Spearmint herbal tea has significant anti-androgen effects in polycystic ovarian syndrome. A randomized controlled trial. Phytotherapy Research. 2010. Read 2026-10-23.
- An update on plant derived anti-androgens. International Journal of Endocrinology and Metabolism. 2012. Read 2026-10-23.
- GBIF Backbone Taxonomy, species match service (api.gbif.org/v1/species/match), queried for each scientific name used on this page. Read 2026-10-23.
- Herbal compounds in the treatment of polycystic ovary syndrome: an updated systematic review. Journal of Ovarian Research. 2026. Read 2026-10-23.
- NCCIH, NIH. Chasteberry. Last updated April 2025. Read 2026-10-23.
- The efficacy and safety of Cangfu Daotan decoction in the treatment of infertility associated with polycystic ovary syndrome: a systematic review and meta-analysis. Journal of Ovarian Research. 2026. Read 2026-10-23.
Education, not medical advice. This page is for general information. It does not diagnose or treat any condition and is not a substitute for care from a qualified health professional. Natural does not automatically mean safe. Ask a clinician or pharmacist before changing your care, especially if you take medication, are pregnant or breastfeeding, or have a health condition.