Meridian Medica — Shepherd's Purse

01

Identity

Botanical Profile

Capsella bursa-pastoris (L.) Medik. — Aerial parts (whole herb — leaf, stem, flower, and characteristic heart-shaped seed pods). Native to Europe and western Asia; now one of the most cosmopolitan weeds on Earth, found on every continent except Antarctica

Leaf: mild peppery-mustard flavor typical of Brassicaceae (similar to mild arugula). Seed pods: distinctive heart/purse-shaped silicles. Whole plant: mild brassica aroma when crushed. Tincture: greenish, mildly bitter with peppery finish. Tea: mild, slightly astringent.

Species Integrity

Shepherd's purse is readily identifiable by its distinctive heart-shaped (cordate) seed pods — the 'purse' shape is unique among common weeds and is the single best identification feature.

02

Compounds

Active Compound Profile

Flavonoids (rutin, quercetin, hesperidin, diosmin)

0.5–2% dry weight

Vascular-strengthening; anti-inflammatory; antioxidant; rutin and diosmin specifically improve capillary integrity and reduce vascular permeability

Tyramine

Variable; present in fresh and dried herb

Sympathomimetic amine; promotes vasoconstriction; contributes to hemostatic (blood-stopping) action through vascular tone enhancement

Fumaric acid

Variable

Anti-inflammatory; immunomodulatory (fumaric acid esters are used pharmaceutically for psoriasis and multiple sclerosis); contributes to overall anti-inflammatory profile

Sulforaphane precursors (glucosinolates)

Present as typical Brassicaceae member

Nrf2 pathway activation; phase II detoxification enzyme induction; anti-inflammatory; anticancer activity

Vitamin K1 (phylloquinone)

Significant but unquantified in most analyses; typical of green Brassicaceae

Supports coagulation cascade; contributes to hemostatic action alongside other compounds

Absorption

Fresh plant tincture: Ethanol extraction preserves the full spectrum of flavonoids, tyramine, and other compounds that contribute to the hemostatic action; fresh material retains maximum potency

03

Pathways

Mechanism of Action

★★★☆☆ Hemostatic / Vascular Tone Combined action of tyramine (vasoconstriction), flavonoids (capillary strengthening, reduced permeability), and vitamin K1 (coagulation support) produces a multi-mechanism hemostatic effect that reduces excessive bleeding

★★★☆☆ Uterine Smooth Muscle Modulation Shepherd's purse has documented uterotonic activity, promoting uterine contraction and reducing endometrial blood loss through improved uterine vascular tone

★★★☆☆ Vascular Integrity / Capillary Strengthening Rutin and diosmin strengthen capillary walls, reduce vascular permeability, and improve venous tone — pharmaceutical diosmin preparations are used for chronic venous insufficiency

★★★☆☆ Nrf2 / Phase II Detoxification Glucosinolate-derived sulforaphane activates Nrf2, inducing phase II detoxification enzymes (glutathione S-transferase, NAD(P)H quinone oxidoreductase)

★★★☆☆ Anti-Inflammatory (Fumaric Acid) Fumaric acid and its derivatives modulate NF-κB signaling and have documented immunomodulatory properties

04

Biomarkers

What It Moves in Your Labs

Biomarker	Direction	Target	Mechanism
Menstrual blood loss (subjective / pictorial chart)	↓ Decrease	Reduced pad/tampon usage; lighter flow days	Multi-mechanism hemostatic action: vasoconstriction, capillary strengthening, uterotonic, coagulation support
Hemoglobin	↑ Increase (indirectly)	>12 g/dL	Reducing excessive menstrual blood loss prevents chronic iron-deficiency anemia; preserves hemoglobin
Ferritin	↑ Increase (indirectly)	50–150 ng/mL	Reduced menstrual blood loss preserves iron stores; addresses the most common cause of iron depletion in premenopausal women
hs-CRP	↓ Decrease	<1.0 mg/L	Anti-inflammatory flavonoids and fumaric acid contribute to systemic inflammation reduction

05

Extraction

Extraction & Preparation

Fresh juice (whole herb): 100% of all compounds; myrosinase active for sulforaphane production

Solubility · Moderately water-soluble; well extracted by ethanol-water mixturesMenstruum · 50% ethanol (fresh herb); 45% ethanol (dried herb)Plant material · Fresh aerial parts during flowering (preferred); dried aerial parts acceptableMaceration time · 2–4 weeks (agitate daily)Ratio · 1:2 (fresh); 1:5 (dried)

07

Dosing

Dosing Framework

For menorrhagia: Begin tincture 5 DAYS BEFORE expected menstruation onset. Continue through the end of the period. The preventive dosing is important — starting only after heavy bleeding begins is less effective.

Dose 1

Menorrhagia (cyclic): 30–60 drops tincture 3x/day

Begin 5 days before expected period; continue through menstruation; repeat each cycle for 3+ months

Dose 2

Acute minor bleeding: 30–60 drops tincture every 2 hours

Higher frequency dosing for acute episodes; also apply topically for local hemostatic effect

Dose 3

Tea: 2–3 cups daily during menstruation

Less potent than tincture; steep covered for 15–20 minutes

08

Synergies

Synergy Partners

★★★☆☆ Yarrow (Achillea millefolium) Yarrow is a classic hemostatic herb with complementary mechanisms — astringent tannins, achillin vasoconstriction, and anti-inflammatory action synergize with shepherd's purse

★★★☆☆ Nettle (Urtica dioica) Nettle's iron content and mild hemostatic properties complement shepherd's purse; nettle also provides nutritional support for iron repletion

★★★☆☆ Vitex (Vitex agnus-castus) Vitex normalizes progesterone production through pituitary modulation; progesterone deficiency is a common cause of menorrhagia; addresses root hormonal cause while shepherd's purse manages symptoms

★★★☆☆ Red Raspberry Leaf (Rubus idaeus) Raspberry leaf is a traditional uterine tonic that improves uterine muscle tone; complements shepherd's purse uterotonic action

★★★☆☆ Cayenne (Capsicum annuum) Cayenne's circulatory stimulant action may seem paradoxical but actually enhances delivery of hemostatic compounds to uterine vasculature; also promotes systemic hemostasis at very low doses

Signature Stack

THE MENSTRUAL HARMONY STACK
Components: Shepherd's Purse (aerial parts) + Yarrow (flower) + Vitex (berry, daily) + Red Raspberry Leaf (leaf, daily) + Nettle (leaf, daily) · Multi-pathway convergence: Hemostatic action (shepherd's purse + yarrow) + Hormonal normalization (vitex progesterone modulation) + Uterine tonic (raspberry leaf) + Iron preservation and repletion (nettle + reduced blood loss) · This stack addresses hypothyroid menorrhagia from multiple angles: reducing acute bleeding, strengthening uterine tone, normalizing the hormonal drivers of heavy bleeding, and preserving/repleting iron stores depleted by chronic blood loss. · Practical integration: Vitex + raspberry leaf + nettle as daily foundational herbs throughout the cycle. Add shepherd's purse + yarrow tincture blend cyclically from 5 days before through end of menstruation.

09

Safety

Contraindications & Interactions

Avoid Pregnancy (ABSOLUTE CONTRAINDICATION) Shepherd's purse has documented uterotonic activity and is classified AHPA Class 2b. It stimulates uterine contractions and should NEVER be used during pregnancy.

Minor MAO inhibitor interaction Tyramine in shepherd's purse can cause hypertensive crisis in patients taking MAO inhibitor medications. MAOIs prevent tyramine metabolism, leading to dangerous blood pressure elevation.

Minor Anticoagulant interaction (Vitamin K1) Vitamin K1 content may antagonize warfarin and other vitamin K-dependent anticoagulants. The hemostatic action of shepherd's purse directly opposes anticoagulant therapy.

Minor Thyroid medication (theoretical) As a Brassicaceae member, shepherd's purse contains glucosinolates. Very high intake of raw Brassicaceae vegetables can theoretically interfere with thyroid iodine uptake (goitrogenic effect). This is a dose-dependent concern.

Minor Kidney stones (theoretical) Shepherd's purse contains calcium oxalate. Very high intake could theoretically contribute to calcium oxalate kidney stone formation in susceptible individuals.

11

Evidence

Evidence Base

★★★☆☆ Hemostatic / Menorrhagia Moderate — German Commission E approved; consistent traditional use; limited modern RCTs

★★★☆☆ Uterotonic Activity Moderate — Pharmacological studies confirm; basis for pregnancy contraindication

★★★☆☆ Vascular Integrity (Flavonoids) Moderate — Well-established for flavonoid class (rutin, diosmin); limited shepherd's purse-specific data

★★☆☆☆ Anti-Inflammatory Preliminary — Fumaric acid and flavonoid mechanisms characterized; limited in vivo data

★★☆☆☆ Antimicrobial Preliminary — In vitro activity demonstrated; glucosinolate-derived compounds have antimicrobial properties

Evidence Gaps

The highest-value research gap for Meridian Medica: a randomized controlled trial comparing shepherd's purse tincture vs. placebo for menorrhagia in hypothyroid women. Menorrhagia is one of the most common and distressing symptoms of hypothyroidism, and shepherd's purse is the most consistently recommended herbal intervention across traditions. A trial measuring menstrual blood loss (pictorial blood assessment chart), hemoglobin, ferritin, and quality of life measures over 3 menstrual cycles would directly validate or refute this widespread traditional use.

Quality Alert

Shepherd's purse has relatively low adulteration risk due to global abundance:

12

Protocol

Protocol Integration

Layer 1: Hypothalamic / Autonomic — HPA axis, circadian rhythm, stress response

Layer 2: Systemic Nutritional Repletion — Micronutrient optimization, antioxidant defense

Layer 3: Gut Permeability / Microbiome — Tight junction repair, motility, SIBO management

Recipe Integration

Shepherd's Purse Menstrual Support Tincture (signature preparation)

30–60 drops 3x/day cyclically (5 days pre-menses through end of period)

Feed the Markers

Shepherd's purse appears in the following Meridian Medica protocol contexts: