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Equisetum arvense

Equisetum arvense

Spring horsetail; gather only from clean sites.

Rhizomes; two stem forms.

Family
Equisetaceae
Plant type
Perennial herb
Safety level (indicative)
Caution
What the safety levels mean (expand legend)
  • Generally recognised as safe. Often a common herb with reasonable harvest and use; still read the specific warnings on the card.
  • Information. Primarily informational — details in the text and warnings below matter most.
  • Caution. Needs extra care (dose, duration, sensitive groups, interactions).
  • Risky. Significant risks — verify sources, contraindications and professional guidance.
  • Not for home experimentation. Not suitable to experiment with at home without knowledge and certainty.
  • High risk for internal use. Particular risk with internal use (e.g. alkaloids); avoid prolonged or irresponsible dosing.
  • Not specified. Level not filled in yet — rely on individual warnings and links below.
Equisetum arvense — plant habitus (Wikimedia Commons).

Photograph on Wikimedia Commons (CC BY 4.0).

Plant habit

Safety — read before use

For this herb it is important to check warnings, mix-ups and cautions. Start with the Safety section.

Quick overview

A practical summary; details are in the sections below.

Safety grade
Caution·details
Scientific sources on the card
Yes — sources are listed with claims·Science section
When and what to harvest
  • Leaf — March–April
Full harvest section
Processing methods

Decoction, Bath additive, Herbal vinegar

All methods and recipes on the card
Topics and symptoms

Circulation comfort (folk), Digestion, Fatigue and low energy…

Topics section · Symptoms overview

Identification and mix-ups

Pale spring stems without chlorophyll.

Possible mix-ups and risks

Other horsetails—identify carefully.

Similar herbs

  • Symphytum officinale

    Both require caution with long-term internal use and clean harvest sites — follow the herb pages and sources.

Topics and symptoms

More topics are in the symptoms and topics overview.

Geographic occurrence

  • Czechia

    Common (expected wild occurrence in the region)

    Widespread occurrence in the Czech Republic in suitable habitats.

  • Austria

    Common (expected wild occurrence in the region)

    Wave 1 (seed): broad range in Central Europe — verify with floras and national checklists.

  • Germany

    Common (expected wild occurrence in the region)

    Wave 1 (seed): broad range in Central Europe — verify with floras and national checklists.

  • Hungary

    Common (expected wild occurrence in the region)

    Wave 1 (seed): broad range in Central Europe — verify with floras and national checklists.

  • Poland

    Common (expected wild occurrence in the region)

    Wave 1 (seed): broad range in Central Europe — verify with floras and national checklists.

  • Slovakia

    Common (expected wild occurrence in the region)

    Wave 1 (seed): broad range in Central Europe — verify with floras and national checklists.

Harvest

  • LeafMarch–April

    jaro

    Region: Czechia

    Notes: Spring stems — clean sites.

Storage

  • Drying(Leaf)

    Keep dried plant material in a sealed container.

    Light:
    Out of direct UV.
    Moisture:
    Low relative humidity.

Processing methods on this herb card

  • Decoction(Leaf)Suitability: Medium suitability

    Longer simmering of plant material in water.

    Full method description (from the catalogue)

    A decoction is made by simmering plant material in water — often around 10–20 minutes depending on tradition and plant part. Denser parts (roots, bark, some seeds) are often prepared more reliably this way than with a short infusion.

    Compared with an infusion it can extract more compounds, but also more tannins or bitterness; the flavour profile differs from a delicate tea. Combine this overview with the herb card for suitable plant part and contraindications.

    Traditional context for this method: yes·Scientific context for this method: no

    Field horsetail spring-top decoction

    About 15 minBeginnerScience profile

    Open recipe →

  • Bath additive(Leaf)Suitability: Medium suitability

    Addition to bath water or a bath decoction; topical use.

    Full method description (from the catalogue)

    Bath preparations transfer soluble compounds into water for short-term skin contact. Concentration and water temperature change sensation and possible irritation.

    Rinse the tub afterwards so residues from strongly coloured plants do not linger.

    Traditional context for this method: yes·Scientific context for this method: no

    Bath with horsetail decoction

    About 25 minBeginnerScience profile

    Open recipe →

  • Herbal vinegar(Leaf)Suitability: Medium suitability

    Maceration or extraction in vinegar; acidity changes flavour and extraction.

    Full method description (from the catalogue)

    Herbal vinegar uses acetic acid as part of the solvent. You get different flavours and sometimes different stability than with alcohol or water. Vinegars are used culinarily and as bases for traditional oxymels per recipe.

    Vinegar quality (food grade, known origin) matters; metal vessels can react — prefer glass or stainless steel.

    Traditional context for this method: yes·Scientific context for this method: no

    Field horsetail vinegar

    About 30 minBeginnerScience profile

    Open recipe →

Traditional / spiritual use

Kept separate from science — entries are cultural or symbolic, not medical advice.

Related guides in the library

  • Horsetail spring stems and see-through wet places

    General

    Traditional useFolk useHerbal lore

    Field horsetail suggests damp ditches and translucent spring stems; folk images lean toward a clean gathering place rather than an effect promise. Respect for the harvest site matters more than symbolism alone.

    Form:
    odvar z natě v minulosti
    Claim strength:
    Tradition
    Source note:
    Seasonal and site context — not therapeutic guidance.

Scientific notes

Each claim lists a study type and a source (URL or DOI) where available. Dose notes from the literature are informational only.

How to read evidence strength and study type labels

Labels summarise how the catalogue entry is tagged — they are not a medical verdict on efficacy. For every row, read the summary, limitations and source link.

Evidence strength

Evidence level not specified
The author did not grade the record; judge from the summary, limitations and source link.
Narrative / orientational literature
Descriptive or expert literature without controlled group comparison — context rather than proof of effect.
Weak evidence
Study or conclusion with major methodological limits; treat only as a pointer for further reading.
Preliminary findings
First or smaller studies — interesting direction, not the final word on efficacy or safety.
Moderate strength of evidence
Moderate strength by study design; sample and context limits still apply.
Stronger evidence
Stronger design or consistency of results within the study's stated limits.
Review article
A review summarises multiple sources; quality depends on review method and field.

Study type

Narrative / expert text
Expert text or overview without a classical study design.
In vitro study
Cell culture or test-tube experiment — does not show an effect in the body.
Animal study
Animal model — transfer to humans is not automatic.
Observational study
Observing groups without random treatment assignment; confounding is possible.
Clinical trial
Human clinical trial; sample size and control group matter.
Randomised controlled trial
Randomised controlled trials are among the stronger designs when well conducted.
Review study
A review aggregates multiple papers — quality depends on selection rules.
Systematic review
Systematic review with explicit search and selection methodology.
Meta-analysis
Statistical pooling of studies; outcome depends on input data and heterogeneity.
Regulatory assessment / monograph (EMA, WHO…)
Regulatory body summary for a herbal product — different context from a single RCT; often about products, not home tea.
Expert monograph (herbal preparations)
Structured literature summary for a plant or drug — quality depends on author and edition year.

  • Horsetail silica and flavonoid fractions are analysed in analytical chemistry; diuretic or connective-tissue benefit claims from small human trials remain contested.

    Evidence level not specifiedNarrative / expert text

    Limitations: Species-dependent toxicity; thiaminase concern with chronic raw use; kidney disease patients need specialist oversight.

    Reference into the scientific literature (orientation)

Images

The main photo is in the card header. More images will appear here when available.

Safety

What the warning types mean

The type on each warning helps group themes — it does not replace the separate severity badge.

Internal use
Risks from swallowing, extracts, duration of use or concentration for internal use.
Interactions / medicines
Possible effect on medicines or concurrent treatment — check sources and a professional.
Raw plant parts
Raw, unripe or poorly prepared plant parts can be dangerous.
Toxins and regulation
Toxic constituents or regulated compounds (e.g. in distillates).
Contact with the plant
Skin or mucosa irritation from contact with fresh plant or sap.
Allergy
Allergic reactions, often linked to family sensitisation.
Harvesting and contamination
Contamination, species mix-ups or harvesting from unsuitable places.

No structured safety records yet.