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Rosmarinus officinalis

Rosmarinus officinalis

Other names: Rosemary

Needle-like aromatic leaves; hardy in milder regions.

Upright branches, strongly aromatic leaves.

Family
Lamiaceae
Plant type
Subshrub
Safety level (indicative)
Generally recognised as safe
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.
Rozmarýn lékařský — habitus rostliny (Wikimedia Commons).

Fotografie na Wikimedia Commons (GFDL 1.2).

Plant habit

Quick overview

A practical summary; details are in the sections below.

Safety grade
Generally recognised as safe·details
Scientific sources on the card
Yes — sources are listed with claims·Science section
When and what to harvest
  • Leaf — May–September
Full harvest section
Processing methods

Herbal infusion (tea), Herbal oil, Honey macerate

All methods and recipes on the card
Topics and symptoms

Anxiety & inner restlessness, Circulation comfort (folk), Complexion and local blemishes

Topics section · Symptoms overview

Identification and mix-ups

Underside of leaves often paler.

Possible mix-ups and risks

Lavender and cultivated sages.

Similar herbs

No related herbs are linked yet.

Topics and symptoms

More topics are in the symptoms and topics overview.

Geographic occurrence

  • Czechia

    Common (expected wild occurrence in the region)

  • Austria

    Occasional (garden, cultivation, or fringe of the range)

  • Germany

    Occasional (garden, cultivation, or fringe of the range)

  • Hungary

    Occasional (garden, cultivation, or fringe of the range)

  • Poland

    Occasional (garden, cultivation, or fringe of the range)

  • Slovakia

    Occasional (garden, cultivation, or fringe of the range)

  • France

    Occasional (garden, cultivation, or fringe of the range)

  • Morocco

    Occasional (garden, cultivation, or fringe of the range)

  • South Africa

    Occasional (garden, cultivation, or fringe of the range)

Harvest

  • LeafMay–September

    léto

    Region: Czechia

    Notes: Harvest note (full translation pending): Nat nebo list v suchu; cista stanoviste.

Storage

  • Drying(Leaf)

    Sušený rostlinný materiál uchovávej v uzavřené nádobě.

    Light:
    Mimo přímé UV.
    Moisture:
    Nízká relativní vlhkost.

Processing methods on this herb card

  • Herbal infusion (tea)(Leaf)Suitability: High suitability

    Infusion or brief extraction in hot water; usually without long boiling.

    Full method description (from the catalogue)

    In the narrow sense, “tea” often means an infusion: you pour water just off the boil over the dried plant matter and let it steep for a few minutes. Temperature, steep time, and the herb-to-water ratio change both flavour and what dissolves into the liquid.

    Compared with a decoction, heat exposure is shorter and gentler; tender leaves and flowers are often better as an infusion than with prolonged simmering. For each herb, always follow the plant card for suitable plant part, preparation, and safety notes — general rules never replace species-level judgement.

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

    Procedure (recipe)

    Rosmarinus officinalis — Herbal infusion (tea) (Leaf)

    About 8 min · Difficulty: Beginner

    Extraction parameters (rough guide): 250 ml water · 90–100 °C · 5–10 min steep

    1. Use 1 teaspoon dried leaf per cup.
    2. Pour boiling water, cover, and steep 5–8 minutes.
    3. Strain — strongly aromatic; gets more bitter with longer steeping.

    If you have high blood pressure or take cardiovascular medicines, check reliable references.

    Why this way (extraction / behaviour of constituents)

    HMPC dokument pro list rozmarýnu zmiňuje tradiční použití při dyspepsii a muskuloskeletální bolesti v přípravcích; silný čaj doma může být dráždivý. Těhotenství, děti a jaterní potíže řeš podle varování v PDF, ne podle blogů.

    What is typically released
    Silice (tymol, karvakrol) a fenolové kyseliny.
    Solvent / water
    Voda.
    After preparation
    Čerstvě.

    Extra literature for the recipe

  • Herbal oil(Leaf)Suitability: High suitability

    Macerating herbs in a vegetable oil (cold or with gentle heat).

    Full method description (from the catalogue)

    Herbal oil is made by steeping dried or fresh material in oil (e.g. olive, sunflower) over time, sometimes with gentle warming. The result is not steam-distilled essential oil — it is a different extract type and usage (often topical or culinary per recipe).

    Temperature, light, and material moisture affect shelf life; rancid oil must be discarded.

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

    Procedure (recipe)

    Rosemary oil

    About 35 min · Difficulty: Beginner

    1. Coarsely chop dried or fresh leaf and fill the jar about halfway.
    2. Cover with olive or sunflower oil, close, and macerate 3–4 weeks in a warm shady place, shaking occasionally.
    3. Strain through cloth; use in marinades, roasting, or externally after a patch test on the forearm.

    Maceration takes weeks; if you have high blood pressure or take cardiovascular medicines, check suitability.

    Why this way (extraction / behaviour of constituents)

    Home preparation following this recipe is mainly educational and cultural; it should not be assumed to match the extractive or safety profile of registered medicines or standardized extracts. Check specific effects, drug interactions, and contraindications on the herb card and with your clinician if you use prescription drugs.

    What is typically released
    orientační domácí extrakce — profil závisí na teplotě, času řezu a poměrech
    Solvent / water
    mediální složení (voda, alkohol, olej, med…) viz jednotlivé kroky
    After preparation
    po přípravě uchovávej hygienicky a podle typu výrobku (chlad, světlo, alkohol)

    Extra literature for the recipe

  • Honey macerate(Leaf)Suitability: High suitability

    Macerating plant material in honey (a honey conserve).

    Full method description (from the catalogue)

    Honey as a maceration medium creates a viscous mixture with its own biochemistry: water activity, acidity, and enzymes influence shelf life and flavour. Traditionally it is used with delicate flowers or herbs when you want aroma bound into honey.

    Infant botulism guidance for honey and honey safety in general sit outside a single herb page; maceration time, ratios, and storage must follow a vetted recipe and source, not this general overview alone.

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

    Procedure (recipe)

    Rosemary honey

    About 30 min · Difficulty: Beginner

    1. Fill only about one quarter of the jar with dried leaf — rosemary is strong.
    2. Cover with honey and macerate 2–3 weeks, then strain.
    3. Use in marinades and roasting; if blood pressure is high, use sparingly.

    Maceration takes weeks.

    Why this way (extraction / behaviour of constituents)

    Phenolic volatile-oil components (e.g. thymol, carvacrol) partially transfer into honey during maceration; concentration depends on leaf cut, temperature, and time. The result is an aromatic concentrate, not a standardized monograph extract.

    What is typically released
    Silice a polární antioxidanty částečně v medu.
    Solvent / water
    Med; macerace 2–3 týdny.
    After preparation
    Po scedění chladně.

    Extra literature for the recipe

Traditional / spiritual use

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

  • Traditional folk context

    General

    The herb appears in older folk customs referenced on Czech cards. This note is cultural memory and seasonal storytelling — not a dosing guide, clinical indication, or substitute for the safety section.

    Form:
    různé
    Claim strength:
    Tradition
    Source note:
    Cultural framing only.

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.
  • Evidence summary (full translation pending): O ucincich a bezpecnosti existuje odborna literatura; zaznam je orientacni a nenahrazuje peci odbornika.

    Evidence level not specifiedNarrative / expert text

    Limitations: Limitations (translation pending): Seed katalogu — dopln konkretni studie podle obsahu.

    Vyhledávání studií (PubMed apod.)

  • Evidence summary (full translation pending): EMA HMPC pro list rozmarynu (a olej); caj z listu je blizka tradicni forma, ne vsak identicka s extrakty v dokumentu.

    Review articleRegulatory assessment / monograph (EMA, WHO…)Year: 2024

    Preparation form in the study: infusion

    Active compound / focus: kyselina rosmarinová, silice (dle dokumentu)

    Limitations: Limitations (translation pending): Opatrnost u tehotenstvi, deti a jaternich potizi dle dokumentu.

    Dose note (from literature): Dosage notes (translation pending): Viz PDF k pripravkum.

    EMA Committee on Herbal Medicinal Products (HMPC)European Medicines Agency

    EMA: Final assessment report on Rosmarinus officinalis L., folium and aetheroleum (revision 1)

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.