East Indian Lemongrass (Cymbopogon flexuosus): Benefits, Dosage, Safety & Evidence

Frequently asked questions

How does East Indian lemongrass work as an antimicrobial?

East Indian lemongrass exerts antimicrobial activity primarily through its high citral content, which disrupts bacterial cell membranes and interferes with cellular processes. The essential oil also contains geraniol and limonene, compounds that demonstrate antifungal and antibacterial properties in laboratory studies. These volatile compounds damage microbial cell walls, leading to cell death. Evidence level: C indicates preclinical studies support traditional use, but human clinical trials remain limited.

Does lemongrass interact with any medications?

East Indian lemongrass may interact with medications metabolized by liver enzymes, particularly cytochrome P450 pathways. Citral and limonene may affect how certain drugs are processed in the body. Individuals taking antidiabetic medications should monitor blood glucose closely, as lemongrass may have hypoglycemic effects. Those on diuretics or antihypertensives should use caution due to potential additive effects. Evidence level: C. Consult a healthcare provider before combining with prescription medications.

What is the recommended dosage for East Indian lemongrass tea?

The traditional adult dosage for East Indian lemongrass is 2-4 grams of fresh leaf prepared as a tea, consumed up to three times daily. To prepare, steep fresh or dried leaves in boiling water for 5-10 minutes. For dried herb, approximately 1-2 grams per cup is typical. This dosage is based on traditional Ayurvedic use rather than standardized clinical trials. Evidence level: Traditional. Start with lower doses to assess tolerance.

Is lemongrass safe during pregnancy and breastfeeding?

East Indian lemongrass is considered unsafe during pregnancy and should be avoided. The essential oil contains citral, which may stimulate uterine contractions and potentially affect fetal development. Animal studies suggest reproductive effects at high doses. Breastfeeding women should also avoid medicinal doses, though culinary amounts in food are generally acceptable. The essential oil should never be used internally during pregnancy. Evidence level: C. Consult a healthcare provider before use.

What are the side effects of lemongrass essential oil?

Undiluted lemongrass essential oil can cause skin irritation, redness, and contact dermatitis in sensitive individuals. Always dilute the essential oil in a carrier oil before topical application. Internal use of the essential oil is not recommended without professional guidance, as it may cause gastrointestinal upset, dizziness, or oral mucosal irritation. Those sensitive to other grasses may experience allergic reactions. Evidence level: C. Perform a patch test before topical use.

Can lemongrass help reduce fever?

East Indian lemongrass has been used traditionally in Ayurvedic medicine to reduce fever, often prepared as a tea to induce sweating and promote cooling. The herb contains anti-inflammatory compounds including citral and limonene, which may help modulate inflammatory responses associated with fever. However, clinical evidence specifically supporting its antipyretic effects in humans is limited. Evidence level: C. Lemongrass should not replace conventional fever management in serious conditions.

PubMed-compiled information sheet

This sheet was compiled from PubMed (NIH) abstracts using AI assistance. Every factual claim is cited to a real PubMed article (see the source list). It has not yet been human-reviewed — confirm with a healthcare provider before use.

Compiled from 30 PubMed articles · model: gemma4:31b

Summary

East Indian Lemongrass (Cymbopogon flexuosus) is an aromatic grass valued for its essential oil, which exhibits antimicrobial, antioxidant, and anti-inflammatory properties [PMID:36320351, 29450147].

Background

Cymbopogon flexuosus is a perennial aromatic grass cultivated worldwide for its essential oil, which has significant industrial potential in the fragrance, cosmetic, food, and medicinal sectors [PMID:38370218, 33550131, 39125724].

Traditional uses

It is used in traditional medicine, beverages, fragrances, and gardening [PMID:39125724].

Active compounds

The primary active compound is citral (including α-citral and β-citral) [PMID:36320351, 38370218]. Other identified components include geraniol, geranial, and geranyl acetate [PMID:29854620, 35807645].

Mechanism of action

The essential oil and citral demonstrate the ability to reduce biofilm biomass and cell viability by interfering with adhesive characteristics and disrupting the biofilm matrix through counteracting nucleic acids and proteins [PMID:33415085]. In cancer cells, it has been shown to significantly suppress HSP90 gene expression [PMID:29854620]. In human dermal fibroblasts, it inhibits the production of inflammatory biomarkers such as VCAM-1, IP-10, I-TAC, and MIG [PMID:29450147].

Clinical evidence

Evidence BDandruff

Hair tonics containing 5%, 10%, or 15% lemongrass oil significantly reduced dandruff by day 7 and day 14, with the 10% formulation appearing most effective [PMID:26566122].

Safety & adverse effects

Essential oils are generally considered safe for external usage [PMID:35638282]. In animal feed, the European Food Safety Authority (EFSA) concluded it is safe at specific maximum levels ranging from 33 mg/kg to 125 mg/kg depending on the species [PMID:37502018].

Evidence summary

Evidence consists primarily of in vitro studies (antimicrobial, cytotoxic, and anti-inflammatory) and animal models (diabetes in rats), with one randomized controlled trial supporting its efficacy for dandruff treatment.

PubMed sources

1.PMID: 26566122 (2015) — Anti-dandruff Hair Tonic Containing Lemongrass (Cymbopogon flexuosus) Oil. · Forschende Komplementarmedizin (2006)
2.PMID: 37244976 (2023) — Chitosan oligomers (COS) trigger a coordinated biochemical response of lemongrass (Cymbopogon flexuosus) plants to palliate salinity-induced oxidative stress. · Scientific reports
3.PMID: 38370218 (2024) — Lemongrass (Cymbopogon flexuosus) growth rate, essential oil yield and composition as influenced by different soil conditioners under two watering regimes. · Heliyon
4.PMID: 38541661 (2024) — Influence of Lemongrass Essential Oil (Cymbopogon flexuosus) Supplementation on Diabetes in Rat Model. · Life (Basel, Switzerland)
5.PMID: 31872103 (2019) — Lemongrass (Cymbopogon Flexuosus Steud.) wats treated textile: A control measure against vector-borne diseases.

East Indian Lemongrass

Sources & Citations

Calculate a safe dose of East Indian Lemongrass