# Cuckoo Flower (Cardamine pratensis)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/cuckoo-flower
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-01
**Evidence Score:** 2 / 10
**Category:** European
**Also Known As:** Cardamine pratensis, Lady's Smock, Mayflower, Milkmaids, Cuckooflower, Meadow Cress, Bitter Cress, Smock, Water Cress (regional variant), Spring Cress

## Overview

Cuckoo flower (Cardamine pratensis) is a European wild plant rich in glucosinolates, particularly gluconasturtiin, and ascorbic acid (vitamin C), which historically made it a remedy for scurvy and a nutritional edible green. Its glucosinolates are hydrolyzed by myrosinase into isothiocyanates, compounds under investigation for [antioxidant](/ingredients/condition/antioxidant) and potential [thyroid](/ingredients/condition/hormonal)-modulating effects.

## Health Benefits

• May aid in scurvy prevention due to high vitamin C content; based on anecdotal evidence, not modern trials. • Potential [thyroid function](/ingredients/condition/hormonal) impact from glucosinolates; requires caution in high intake. • May provide nutritional benefits when consumed as part of a salad or raw dish. • Traditionally used for its pungent flavor similar to watercress. • Historical use suggests potential [antioxidant](/ingredients/condition/antioxidant) benefits, but lacks supporting clinical studies.

## Mechanism of Action

Cuckoo flower contains glucosinolates such as gluconasturtiin, which are enzymatically converted by myrosinase upon tissue disruption into phenethyl isothiocyanate (PEITC), a compound that activates Nrf2-mediated [antioxidant](/ingredients/condition/antioxidant) pathways and may inhibit [thyroid](/ingredients/condition/hormonal) peroxidase at high doses, potentially reducing thyroid hormone synthesis. Its ascorbic acid content supports collagen biosynthesis by serving as a cofactor for prolyl and lysyl hydroxylase enzymes. Flavonoids including quercetin glycosides in the plant may additionally inhibit cyclooxygenase (COX) enzymes, contributing to mild [anti-inflammatory](/ingredients/condition/inflammation) activity.

## Clinical Summary

No modern randomized controlled trials have been conducted specifically on Cardamine pratensis as a supplement or therapeutic intervention. Its traditional use in scurvy prevention is supported by documented ascorbic acid content, but no quantified human dose-response studies exist for this species specifically. Evidence for glucosinolate activity in [thyroid](/ingredients/condition/hormonal) modulation is extrapolated from broader brassica-family research, including observational studies noting goitrogenic effects at very high habitual crucifer consumption. Overall, the evidence base remains at the level of historical ethnobotanical records, nutrient composition analyses, and mechanistic in vitro data, with no clinical trials establishing therapeutic dosages or confirmed outcomes.

## Nutritional Profile

Cuckoo Flower (Cardamine pratensis) is a nutrient-dense wild edible with limited formal quantitative analysis, but the following is known based on related Cardamine species and Brassicaceae family data: Vitamin C (ascorbic acid): approximately 50–100 mg per 100g fresh weight, comparable to watercress, supporting its historical use in scurvy prevention. Glucosinolates: primarily gluconasturtiin and related aliphatic glucosinolates at estimated 5–15 µmol/g dry weight, which hydrolyze to isothiocyanates upon tissue damage — these are the primary bioactive compounds with both health-promoting and [thyroid](/ingredients/condition/hormonal)-disrupting potential at high intake. Flavonoids: quercetin and kaempferol glycosides are present as in related Brassicaceae species, contributing to [antioxidant](/ingredients/condition/antioxidant) capacity. Carotenoids: beta-carotene and lutein likely present in leaf tissue given its dark green pigmentation, estimated at 1–3 mg per 100g fresh weight based on family analogs. Protein: approximately 2–4g per 100g fresh weight, relatively high for a leafy green. Dietary fiber: estimated 1.5–2.5g per 100g fresh weight. Minerals: iron (~1–2 mg/100g), calcium (~80–120 mg/100g), and potassium (~200–300 mg/100g) are plausible based on Brassicaceae norms. Bioavailability note: oxalate levels are low compared to spinach, making mineral absorption relatively favorable. Glucosinolate hydrolysis is activated by chewing or cutting, so raw consumption maximizes isothiocyanate bioavailability. Formal compositional studies specific to C. pratensis remain sparse as of 2024.

## Dosage & Preparation

No clinically studied dosage ranges or forms are available due to the absence of human trials. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

High intake of cuckoo flower is contraindicated or should be approached with caution in individuals with hypo[thyroid](/ingredients/condition/hormonal)ism or those taking levothyroxine, as glucosinolate-derived isothiocyanates can competitively inhibit thyroid iodine uptake and thyroid peroxidase activity. Individuals on anticoagulant therapy such as warfarin should exercise caution, as the plant's vitamin K content may interfere with INR stability. Pregnant or breastfeeding women are advised to avoid medicinal doses due to the absence of safety data, though culinary consumption in small salad quantities is generally considered low-risk. Allergic cross-reactivity may occur in individuals sensitive to other Brassicaceae family plants such as mustard or watercress.

## Scientific Research

No human clinical trials or meta-analyses have been identified for Cardamine pratensis in the research dossier. The existing studies focus on phytochemical profiling rather than clinical efficacy.

## Historical & Cultural Context

Historically, Cuckoo Flower has been used in British and northern English traditions as a remedy for scurvy, attributed to its high vitamin C content. It is named 'cuckoo flower' due to its blooming period coinciding with the calls of the cuckoo bird.

## Synergistic Combinations

Watercress, Nasturtium, Kale, Arugula, Mustard Greens

## Frequently Asked Questions

### What is cuckoo flower used for in traditional medicine?

In European folk medicine, cuckoo flower was consumed raw as a spring green to prevent and treat scurvy, leveraging its ascorbic acid content comparable to other wild edible Brassicaceae. It was also used as a diuretic and mild expectorant in German and British herbalism, though these uses are documented only in historical herbal texts without clinical validation.

### Does cuckoo flower affect the thyroid?

Yes, cuckoo flower contains glucosinolates including gluconasturtiin that are converted to isothiocyanates upon chewing or processing, and these compounds can inhibit thyroid peroxidase and reduce iodine organification at high intake levels. People with existing hypothyroidism or Hashimoto's thyroiditis should avoid large or supplemental doses, though casual salad-level consumption is unlikely to produce clinically significant thyroid suppression in healthy individuals.

### What vitamins and compounds are in cuckoo flower?

Cuckoo flower contains ascorbic acid (vitamin C), glucosinolates particularly gluconasturtiin, quercetin glycosides, kaempferol derivatives, and moderate levels of vitamin K and dietary minerals including iodine. The isothiocyanate phenethyl isothiocyanate (PEITC), released upon myrosinase activation, is considered the primary bioactive compound with antioxidant and potential chemopreventive properties based on in vitro evidence.

### Can you eat cuckoo flower raw?

Yes, Cardamine pratensis leaves and flowers are edible raw and have been consumed in European salads and as garnishes for centuries, offering a peppery, slightly bitter flavor similar to watercress. Raw consumption preserves intact ascorbic acid and allows myrosinase-mediated glucosinolate hydrolysis to produce isothiocyanates, whereas cooking partially degrades both vitamin C and myrosinase activity, reducing bioavailability of these compounds.

### Is cuckoo flower safe during pregnancy?

There is insufficient safety data to recommend cuckoo flower in medicinal or supplemental doses during pregnancy or breastfeeding, and caution is advised due to the goitrogenic potential of its isothiocyanates, which could theoretically affect fetal thyroid development at high intake levels. Small culinary amounts as part of a varied diet are generally not considered hazardous, but no human studies have specifically assessed safety in pregnant populations.

### How does cuckoo flower compare to watercress in terms of nutrition and flavor?

Cuckoo flower has a similar pungent, peppery flavor to watercress and shares comparable nutritional profiles, including high vitamin C content and glucosinolates. Both plants are traditionally used as salad greens in European cuisine and may offer similar antioxidant benefits. However, cuckoo flower is less commonly cultivated commercially than watercress, making it less readily available in most markets.

### What is the recommended daily intake of cuckoo flower, and how should it be consumed?

There is no established clinical dosage for cuckoo flower, as modern scientific trials are limited; traditional use suggests consuming it fresh in salads or as part of culinary dishes in moderate amounts. Due to its glucosinolate content, consistent high intake should be avoided, particularly for individuals with thyroid sensitivity. Starting with small amounts as a food ingredient rather than a concentrated supplement is the most cautious approach.

### Who should avoid cuckoo flower or use it with caution?

Individuals with existing thyroid conditions, those taking thyroid medications, and people sensitive to glucosinolates should exercise caution with cuckoo flower due to potential thyroid-suppressing effects from high intake. Pregnant women should avoid it based on traditional medicine warnings, and it is not recommended for young children without professional guidance. Anyone with digestive sensitivity to cruciferous plants may also want to limit consumption.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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