Alchemilla vulgaris (Lady's Mantle)

Alchemilla vulgaris, commonly called Lady's Mantle, contains ellagitannins, quercetin, and salicylic acid as its primary bioactive compounds. These phenolics exert antioxidant and anti-inflammatory effects primarily by scavenging reactive oxygen species and inhibiting pro-inflammatory enzymes such as cyclooxygenase.

Origin & History

Alchemilla vulgaris, or Lady's Mantle, is a perennial herb from the Rosaceae family, native to Europe and Asia. Its aerial parts, primarily naturally grown leaves, are used to create extracts via cold processing with solvents like ethanol or water. The resulting extract is typically concentrated and then diluted in a glycerin and water base for use.

Historical & Cultural Context

For centuries, Lady's Mantle has been a staple in European traditional medicine for its astringent, hemostatic, and purported progesterone-like properties. It was historically used to treat skin conditions, greasy skin, and various fungal infections, leveraging its high tannin content.[3][4][5]

Health Benefits

["\u2022 Provides antioxidant effects by scavenging free radicals, though this is based on in vitro evidence, not human trials.[1][2][5]", "\u2022 May soothe skin irritation and reduce inflammation due to its phenolic and tannin content, a mechanism suggested by in vitro studies.[1][2][5]", "\u2022 Exhibits astringent properties that can help tighten pores and cleanse the skin, an effect attributed to its high tannin content.[1][3][4][5]", "\u2022 Traditionally used in European phytotherapy to manage greasy skin and hair, based on historical use rather than clinical data.[3][4][5]", "\u2022 Possesses antimicrobial properties according to traditional medicine, a role linked to its tannins, but this lacks clinical validation.[3][5]"]

How It Works

The ellagitannins and flavonoids in Alchemilla vulgaris, particularly quercetin and agrimoniin, neutralize free radicals by donating hydrogen atoms to reactive oxygen species, thereby interrupting oxidative chain reactions. Its hydrolyzable tannins inhibit cyclooxygenase (COX-1 and COX-2) enzymes, reducing prostaglandin synthesis and downstream inflammatory signaling. Tannins also precipitate proteins on mucosal surfaces, forming a protective astringent layer that reduces local irritation and may inhibit microbial adhesion to epithelial tissue.

Scientific Research

The research dossier provides no human clinical trials, randomized controlled trials (RCTs), or meta-analyses for Alchemilla vulgaris. No PubMed PMIDs, specific study designs, or clinical outcomes are reported, with evidence limited to in vitro studies and traditional use.[1][2]

Clinical Summary

Most evidence supporting Alchemilla vulgaris comes from in vitro cell culture studies and animal models rather than randomized controlled human trials, limiting the strength of efficacy claims. In vitro assays using DPPH and ABTS radical scavenging methods have confirmed significant antioxidant activity attributable to its polyphenol content. A small number of observational and ethnopharmacological studies report use in managing menstrual irregularities and mild digestive complaints, but these lack controlled designs or quantified outcomes. Overall, the clinical evidence base is preliminary, and well-designed human trials with defined dosing and measured endpoints are lacking.

Nutritional Profile

Alchemilla vulgaris (Lady's Mantle) is a medicinal herb not typically consumed as a food source, so conventional macronutrient profiling is limited. However, its bioactive composition is well-characterized: 

• TANNINS (primary bioactives): Ellagitannins and condensed tannins (proanthocyanidins) comprising approximately 6–8% of dry leaf weight, with agrimoniin and pedunculagin as dominant ellagitannin fractions. These are the principal astringent and antioxidant contributors.

• FLAVONOIDS: Quercetin, kaempferol, and their glycosides (notably quercetin-3-glucuronide and rutin) present at approximately 0.5–1.5% of dry weight. Luteolin derivatives also identified in smaller concentrations.

• PHENOLIC ACIDS: Chlorogenic acid, caffeic acid, and ellagic acid detected; total phenolic content estimated at 50–150 mg gallic acid equivalents (GAE) per gram of dry extract depending on extraction method.

• SALICYLIC ACID: Trace amounts (~0.01–0.05% dry weight), contributing mild anti-inflammatory activity.

• LIPIDS: Low lipid content; leaf surfaces contain waxy cuticle compounds including long-chain fatty acids (palmitic, stearic acids) at minor concentrations.

• MINERALS: Contains calcium (~1,200–1,800 mg/100g dry weight), potassium (~1,500–2,000 mg/100g dry weight), magnesium (~200–400 mg/100g dry weight), and trace iron and zinc; concentrations vary by soil and harvest conditions.

• VITAMINS: Modest vitamin C content (~30–60 mg/100g fresh weight); small amounts of vitamin K consistent with other leafy herbs.

• FIBER: Significant insoluble fiber (~15–25% of dry weight) from cell wall polysaccharides, though not consumed in quantities that would contribute meaningfully to dietary fiber intake.

• BIOAVAILABILITY NOTES: Ellagitannins exhibit variable bioavailability; gut microbiota convert them into urolithins (e.g., urolithin A), which are the primary systemically absorbed metabolites. Flavonoid glycosides require hydrolysis by intestinal enzymes prior to absorption. High tannin content may bind dietary proteins and minerals (iron, zinc), potentially reducing their bioavailability if consumed with food. Typical use is as a tea or topical extract, meaning systemic exposure to most bioactives is modest at conventional doses (1–4g dried herb per cup of infusion).

Preparation & Dosage

No clinically studied dosage ranges for internal use are available from human trials. For topical cosmetic applications, leaf extract is sometimes recommended at a concentration of 5-10% in formulations like creams and lotions. Consult a healthcare provider before starting any new supplement.

Synergy & Pairings

Vitamin C, Green Tea Extract, Calendula, Witch Hazel

Safety & Interactions

Alchemilla vulgaris is generally considered safe when consumed in typical herbal tea amounts, but its high tannin content may cause gastrointestinal upset, nausea, or constipation with excessive use. Due to the presence of tannins, it may reduce the absorption of iron and certain oral medications, including antibiotics and alkaloid-based drugs, if taken simultaneously. Its historical use as a uterine tonic means it is contraindicated during pregnancy, as stimulation of uterine smooth muscle is a theoretical risk. People with hepatic conditions should exercise caution, as prolonged high-dose intake of tannin-rich herbs has been associated with liver stress in animal studies.