Lady's Mantle (Alchemilla vulgaris)
What Is Lady's Mantle?
Lady's Mantle is the common name for Alchemilla vulgaris, a plant of the Rosaceae family, native to the mountains and meadows of Europe and western Asia. The material in circulation is aerial parts — leafy growth taken above ground. Most people search for it simply as Lady's Mantle; suppliers, pharmacopoeias and interaction databases list it as Alchemilla vulgaris, and matching the two is the first step in identifying what is actually in a product. Its character is described as mildly astringent, faintly grassy, which is often how the raw material is checked for quality.
Lady's Mantle entered the reference literature through use rather than through chemistry. Older sources are concerned with where it grows, when it is gathered and how it is prepared, questions that still shape the material on sale today. Beyond its practical use it carries cultural associations — medieval alchemists prized its dew — 'mercury of the plants'.
Today most searches for Lady's Mantle come from people reading about energy, or checking how it sits alongside a medication they already take. The use most often documented in the literature is menorrhagia and irregular menses (Commission E), followed by mild diarrhea in children.
How Does Lady's Mantle Work?
Lady's Mantle is not a single active substance. Its chemistry is a mixture, and the fractions that researchers isolate most often are Tannins and Flavonoids. Tannins is the fraction most often standardised in extracts, associated in the literature with astringent polyphenols with antimicrobial properties. Flavonoids is discussed in relation to broad-spectrum antioxidant polyphenols.
Before its chemistry was known, Lady's Mantle was judged by what it did in the cup: how strongly it brewed, how it tasted, and how little or much was needed. Those notes are why particular preparations survived and others did not.
Published research is limited, leaning on small trials, laboratory work and animal models, and this profile cites 1 source. Reported findings centre on aerials: 6-8% tannins (agrimoniin), flavonoids and salicylic acid. Where research exists, it examines menorrhagia and irregular menses (Commission E), mild diarrhea in children and postpartum tissue tonic. These are areas of study, not established outcomes, and results differ by preparation and dose.
How the plant is prepared changes what you actually get. Its constituents move readily into alcohol — so a preparation made in another medium will not carry the same fraction of the plant, which is why traditional recipes specify one over another.
Lady's Mantle is studied as a whole preparation because isolating one fraction tends to behave differently from the material it was taken out of — a recurring finding across the plant-chemistry literature.
Because these constituents are processed by the same pathways that handle many medicines, Lady's Mantle is documented as interacting with iron salts. That is a question of shared metabolism rather than of potency, and it is the main reason the plant is listed in interaction references at all.
Dose, plant part and growing conditions all shift the constituent profile, so two products carrying the name Lady's Mantle can differ substantially; this is why reference entries specify aerial parts and, where they exist, standardisation markers.