Cymbopogon Winterianus (Cymbopogon winterianus): Benefits, Dosage, Safety & Evidence

Questions fréquentes

How does citronella oil work as an insect repellent?

Citronella oil repels insects through its volatile compounds, primarily citronellal, geraniol, and citronellol. These monoterpenes mask human scent cues that attract mosquitoes, making it harder for insects to locate hosts. Research (Evidence Level C) suggests citronellal acts on insect olfactory receptors, disrupting their ability to detect carbon dioxide and lactic acid from human skin. Unlike DEET, citronella doesn't kill insects but creates a sensory barrier. The repellent effect typically lasts 2-4 hours when applied topically, requiring reapplication for continued protection.

Does citronella essential oil interact with any medications?

There are no well-documented drug interactions with topical citronella oil in current medical literature. However, citronella contains compounds metabolized by liver enzymes, and theoretical interactions with anticoagulants or medications metabolized by cytochrome P450 enzymes cannot be ruled out (Evidence Level D). Internal use is not recommended and could potentially interact with sedatives or CNS-active medications. Always consult a healthcare provider before using essential oils alongside prescription medications, especially if you have epilepsy or seizure disorders, as citronella is contraindicated in these conditions.

What is the recommended dosage for citronella essential oil?

For topical use as an insect repellent, citronella essential oil should be diluted to 5-10% concentration in a carrier oil such as coconut or jojoba oil. This equals approximately 5-10 drops of essential oil per teaspoon of carrier oil. Higher concentrations increase the risk of skin sensitization. For aromatherapy purposes, 3-5 drops in a diffuser is standard. Internal use is not recommended due to safety concerns. Evidence Level C supports topical application for insect repellent effects. Always perform a patch test before widespread application to check for allergic reactions.

Is citronella oil safe to use during pregnancy?

Citronella essential oil is considered unsafe during pregnancy and should be avoided, particularly in the first trimester. The oil contains citronellal and other volatile compounds that may stimulate uterine contractions or cross the placental barrier (Evidence Level D). Pregnant women should not use citronella internally under any circumstances. While limited data exists on topical use during pregnancy, the precautionary principle advises complete avoidance. Breastfeeding women should also exercise caution. Consult a qualified healthcare provider for pregnancy-safe insect repellent alternatives.

Can citronella oil cause skin irritation or allergic reactions?

Yes, citronella essential oil can cause skin sensitization and contact dermatitis in some individuals, particularly when used undiluted or at high concentrations. Common reactions include redness, itching, burning, and blistering at the application site. People with sensitive skin or existing allergies to Cymbopogon species should avoid citronella products. Proper dilution (5-10% in carrier oil) significantly reduces these risks (Evidence Level C). A patch test on the inner forearm 24 hours before full application is recommended. Discontinue use immediately if any adverse skin reaction occurs.

What are the main uses of citronella essential oil?

Citronella essential oil is primarily used as a natural insect repellent against mosquitoes, flies, and other biting insects. Traditional and modern applications include antifungal and antimicrobial treatments for minor skin conditions, aromatherapy for stress relief, and topical relief for muscle pain and inflammation. The oil's active compounds—citronellal, geraniol, and citronellol—contribute to its therapeutic properties (Evidence Level C). Citronella is commonly found in candles, sprays, lotions, and diffuser blends. Its repellent effects typically require reapplication every 2-4 hours for continued effectiveness.

Fiche d'information compilée à partir de PubMed

Cette fiche a été compilée à partir de résumés PubMed (NIH) avec l'assistance d'une IA. Chaque affirmation factuelle est citée par un article PubMed réel (voir la liste des sources). Elle n'a pas encore été révisée par un humain — confirmez auprès d'un professionnel de santé avant utilisation.

Compilé à partir de 30 articles PubMed · modèle : gemma4:31b

Résumé

Cymbopogon winterianus, known as Java citronella, is an aromatic medicinal grass used for its essential oil in pharmaceutical, food, and insecticidal applications [PMID: 35566105, 34793445, 38472916].

Contexte

Cymbopogon winterianus (Java citronella) is an industrially important tropical herbaceous plant valued in the aromatic, perfumery, and pharmaceutical industries [PMID: 35214861, 35566105].

Usages traditionnels

In Brazilian folk medicine, it is used for its analgesic, anxiolytic, and anticonvulsant properties [PMID: 17976969], and for the treatment of hypertension [PMID: 20487201].

Composés actifs

The essential oil primarily contains citronellal, geraniol, and citronellol [PMID: 32411423, 35566105, 17976969]. Other identified components include alpha-elemol [PMID: 23855832, 36677603] and various secondary metabolites including phenolics and flavonoids [PMID: 38472916, 33505070].

Mécanisme d'action

Antiepileptic activity in medicinal plants is generally attributed to effects on GABA receptors [PMID: 37581769]. In rats, the essential oil induces dose-dependent hypotension and tachycardia, effects that are partially reduced by atropine administration, suggesting involvement of the vagal pathway [PMID: 20487201].

Preuves cliniques

Preuve DEpilepsy/Convulsions

Essential oil significantly reduced the number of animals exhibiting PTZ- and PIC-induced seizures and increased latencies of STR-induced clonic seizures in rodent models [PMID: 17976969].

Preuve DPulmonary Fibrosis

Essential oil attenuated bleomycin-induced pulmonary fibrosis in a murine model [PMID: 34065064].

Preuve DCandida albicans infections

Essential oil demonstrated antifungal activity, with concentrations of 625 µg/mL and 1250 µg/mL inhibiting growth and acting as a fungicide, respectively [PMID: 24031651, 15707770].

Preuve DLeishmaniasis and Trypanosomiasis

Essential oil exhibited clinically relevant antipromastigote and antiepimastigote activities with LC50 < 62.5 µg/mL in vitro [PMID: 35566105].

Preuve DListeria monocytogenes

Essential oil showed antibacterial properties with a minimum inhibitory concentration (MIC) of 8 µL/mL [PMID: 37297414].

Sécurité et effets indésirables

In vitro studies on mammalian fibroblasts showed significant cytotoxicity only at concentrations greater than 250 µg/mL [PMID: 35566105]. High doses of essential oil (20 mg/kg i.v.) in rats induced bradycardia-associated sinoatrial blockade and atrioventricular block [PMID: 20487201].

Synthèse des preuves

The current evidence is based primarily on in vitro studies and animal models (Level D), demonstrating potential antiepileptic, antifibrotic, and antimicrobial activities, but lacks human clinical trial data.

Sources PubMed

1.PMID: 38472916 (2024) — Cymbopogon winterianus (Java Citronella Plant): A Multi-Faceted Approach for Food Preservation, Insecticidal Effects, and Bread Application. · Foods (Basel, Switzerland)
2.PMID: 35166626 (2022) — Induced variations by gamma radiation and EMS on the agronomic traits, essential oil yield with its quality and their exploitation in Java citronella (Cymbopogon winterianus Jowitt). · International journal of radiation biology
3.PMID: 33505070 (2021) — Valorization of Java citronella (Cymbopogon winterianus Jowitt) distillation waste as a potential source of phenolics/antioxidant: influence of extraction solvents. · Journal of food science and technology
4.PMID: 32411423 (2020) — The Mosquito Repellent Activity of the Active Component of Air Freshener Gel from Java Citronella Oil (Cymbopogon winterianus). · Journal of parasitology research
5.PMID: 31862372

Cymbopogon Winterianus

Sources et citations

Calculer une dose sûre de Cymbopogon Winterianus

Origanum Minutiflorum

Kunzea Ambigua

Saussurea Obvallata

Questions fréquentes

Résumé

Contexte

Usages traditionnels

Composés actifs

Mécanisme d'action

Preuves cliniques

Sécurité et effets indésirables

Synthèse des preuves

Sources PubMed

Sources gouvernementales

Cymbopogon Winterianus

Sources et citations

Calculer une dose sûre de Cymbopogon Winterianus

Plantes associées

Origanum Minutiflorum

Kunzea Ambigua

Saussurea Obvallata

Questions fréquentes

Résumé

Contexte

Usages traditionnels

Composés actifs

Mécanisme d'action

Preuves cliniques

Sécurité et effets indésirables

Synthèse des preuves

Sources PubMed

Sources gouvernementales