Lady's Mantle
A tannin-rich herb long used for heavy periods, but its only human studies are topical ones for mouth ulcers and wounds. There is no clinical evidence at all for menstrual bleeding.
Evidence last reviewed: August 2026
What the science says
- Heavy menstrual bleeding Limited evidence
No clinical trial has tested Alchemilla vulgaris for menorrhagia. The traditional rationale is its astringent tannin content, which has not been shown to affect menstrual blood loss in people.
- Topical healing of mucosa and skin Limited evidence
A small clinical study of topical Alchemilla vulgaris in glycerine reported faster resolution of aphthous mouth ulcers, and a laboratory plus animal study found wound-healing activity for a gel formulation. Both concern topical use, not oral supplements.
Dosage & safety
Studied doseNo studied oral dose. Traditional use is 2-4 g of dried herb as an infusion two to three times daily; capsules typically supply 300-500 mg per serving as a label dose.
SafetyHigh tannin content can cause stomach upset and may reduce absorption of iron and other minerals if taken with meals. Avoid in pregnancy and breastfeeding for lack of data. Liver caution has been suggested for long-term high-dose use.
Scientific references
Where to buy
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