Limited evidenceWomen's health

Pueraria Mirifica

A Thai root with unusually potent phytoestrogens. Small trials show it helps vaginal atrophy symptoms, mostly as a gel; the breast-enlargement claims that sell it have no evidence at all.

Evidence last reviewed: August 2026

What the science says

Vaginal atrophy symptoms Limited evidence
In a 12-week randomized comparison in 82 postmenopausal women, Pueraria mirifica gel reduced vaginal symptom scores as much as conjugated estrogen cream, although estrogen was significantly better on the objective vaginal maturation index.
Menopausal symptom scores Limited evidence
A double-blind trial in 52 hysterectomized women compared 25 mg and 50 mg oral doses over 6 months. Climacteric scores fell similarly with both, but there was no placebo arm, so how much of that is the herb is unknown.
Part of a broader phytoestrogen literature Limited evidence
A systematic review of 33 randomized trials of phytoestrogens for urogenital menopause symptoms included Pueraria mirifica among agents that improved symptoms, and found vaginally applied preparations worked better than oral ones.

Dosage & safety

Studied doseOral trials used 25–50 mg/day of the standardised root powder. Gel trials applied 0.5 g intravaginally daily for two weeks, then three times weekly. Commercial capsules are often far stronger with no dosing rationale.

SafetyThis is a potent phytoestrogen (miroestrol and deoxymiroestrol bind estrogen receptors strongly). Breakthrough bleeding, breast tenderness and menstrual changes are reported, and endometrial safety over long periods has not been established. Avoid with hormone-sensitive cancers, endometrial hyperplasia, in pregnancy or breastfeeding, and alongside hormone therapy or tamoxifen. Breast-enlargement marketing is unsupported by trials.

Scientific references

Comparison of Pueraria mirifica gel and conjugated equine estrogen cream effects on vaginal health in postmenopausal women
Suwanvesh N, Manonai J, Sophonsritsuk A — Menopause, 2017
Comparison of Pueraria mirifica 25 and 50 mg for menopausal symptoms
Virojchaiwong P, Suvithayasiri V, Itharat A — Arch Gynecol Obstet, 2011
Impact of phytoestrogens on treatment of urogenital menopause symptoms: A systematic review of randomized clinical trials
Abdi F, Rahnemaei FA, Roozbeh N — Eur J Obstet Gynecol Reprod Biol, 2021

Where to buy

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