Kaempferia galanga

Kencur

Generally recognised as safe

Other names: Sand ginger, Aromatic ginger

A low South-East Asian herb with an aromatic rhizome.

A very low perennial with green leaves lying flat on the ground and small white flowers; the aromatic rhizome is used as both a spice and a herbal infusion in Indonesian and Thai cooking under the name 'kencur'.

Family: Zingiberaceae
Plant type: Rhizomatous perennial

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.

Kencur — plant habitus (Wikimedia Commons). — Photograph on Wikimedia Commons (Public domain).
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: Root — October–December
Full harvest section
Processing methods: Culinary use, Poultice / compress, Powder
All methods and recipes on the card
Topics and symptoms: Bloating & gas, Digestion, Fatigue and low energy…
Topics section, Symptoms overview

Identification and mix-ups

Stemless perennial rhizomatous herb in Zingiberaceae. Usually 2 (sometimes 2–3) broad, rounded-ovate leaves lying nearly flat on the ground, dark green, thin, 8–15 cm wide. Flowers white with a purple blotch on the lip, short-lived, borne at ground level among the leaves. Rhizome tuberous, aromatic, pale green to greenish-white inside.

Possible mix-ups and risks

Confusion with Kaempferia rotunda, whose rhizomes look similar in commerce, but the living plants differ: K. rotunda has erect, oblong, mottled leaves (purple-tinged beneath) and flowers BEFORE the leaves on separate shoots, whereas K. galanga flowers together with its flat-lying leaves. Another commercial confusion is K. parviflora (black ginger). It is not toxic (medicinal/culinary species).

Similar herbs

No related herbs are linked yet.

Topics and symptoms

More topics are in the symptoms and topics overview.

Bloating & gas
Traditional· Traditional / cultural framing
Digestion
Traditional· Traditional / cultural framing
Fatigue and low energy
Traditional· Traditional / cultural framing
Muscles after exertion
Traditional· Traditional / cultural framing

Sources

Identification
- Kew Plants of the World Online — Kaempferia galanga L.
Confusion risk
- Kew Plants of the World Online — Kaempferia galanga L.

Geographic occurrence

Thailand
Common (expected wild occurrence in the region)

Harvest

RootOctober–December
autumn
Region: Thailand
Notes: Rhizome at the end of the growing season; sliced and dried.

Storage

Refrigeration(Root)
Fresh rhizome keeps 2–3 weeks in the fridge in paper; dried slices a year in an airtight jar, though they lose the camphorous freshness.
Light:
Out of light.
Moisture:
Moulds in damp.

Processing methods on this herb card

Culinary use(Root)Suitability: High suitability
Cooking, baking, seasoning as food — general category without therapeutic claims.
Full method description (from the catalogue)
Culinary use covers herbs as ingredients in dishes, drinks, or spice mixes. This overview does not evaluate medicinal effects — only reminds you about species intent, allergies, and heat treatment where needed (e.g. some fruits or plant parts).
Combining with alcohol, sugar, or long cooking changes outcomes; verify culinary sources.
Traditional context for this method: yes·Scientific context for this method: no
Beras kencur — Javanese jamu of rice and kencur
About 30 minIntermediateScience profile
Open recipe →
Poultice / compress(Root)Suitability: Medium suitability
Liquid or paste on the skin, often through a thin cloth.
Full method description (from the catalogue)
A compress applies moist warm or cool material to the skin directly or through fabric. Duration and temperature are key — too hot can burn; too long can macerate the skin.
Use clean textiles and watch skin reaction during the first minutes.
Traditional context for this method: yes·Scientific context for this method: no
Powder(Root)Suitability: Low suitability
Finely ground dried herb; dosing and solubility depend on species.
Full method description (from the catalogue)
Powder increases surface area for liquids or food. Home milling needs a clean grinder and control of fineness; very fine powder may clog tea filters.
Store airtight against moisture and pests.
Traditional context for this method: yes·Scientific context for this method: no

Traditional / spiritual use

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

Jamu gendong — herbal drinks carried on the back
General
Traditional useFolk useHerbal lore
On Java women sell jamu gendong: a basket of bottled herbal drinks carried on the back in a cloth, door to door. Beras kencur of rice and kencur is the favourite — given to children for appetite and to adults for tiredness — and jamu was inscribed on UNESCO's list of intangible cultural heritage in 2023. In folk medicine grated kencur with rice is applied as a param poultice to sprains and sore muscles. A record of tradition without clinical data.
Form:
jamu gendong — women sellers with baskets on their backs
Claim strength:
Tradition
Source note:
Kumar A (2020), J Ethnopharmacol 253:112667 (traditional uses); UNESCO Representative List of the Intangible Cultural Heritage — Jamu wellness culture (2023).

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.

The review summarises traditional uses of kencur in South and Southeast Asia, the rhizome's composition (ethyl p-methoxycinnamate, ethyl cinnamate, kaempferol, borneol) and laboratory and animal data on anti-inflammatory, analgesic, antimicrobial and insecticidal activity; clinical trials are lacking.
Narrative / orientational literatureReview studyYear: 2020
Limitations: Mostly preclinical data; heterogeneous extracts.
Kumar A — Journal of Ethnopharmacology
Phytochemistry, pharmacological activities and uses of traditional medicinal plant Kaempferia galanga L. – An overview
DOI: 10.1016/j.jep.2020.112667

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.