What are you extracting from lemongrass?

Lemongrass yields both volatile oils and water-soluble compounds. The essential oil is characterized by citral, a mixture of geranial and neral isomers, making up as much as 79.69% of the total composition in some analyses. Other major components include geraniol and myrcene. Composition varies significantly based on genetics, growing location, plant age, extraction method, and time of year. Beyond the oil, the leaves contain flavonoids like luteolin, quercetin, kaempferol, and apigenin, as well as phenolic compounds.

Extraction choices depend on what you want to capture. For the volatile oils, steam distillation is appropriate, yielding an essential oil used in perfumery and flavoring. The process concentrates these aromatic molecules.

To extract a broader range of constituents - including flavonoids and phenolics - consider an ethanol tincture. Ethanol percentage impacts extraction efficiency; a 60-70% ethanol solution is suitable for alkaloids, glycosides, and bitters, while 40-50% works well for general purpose herbs. A 25-30% ethanol solution targets tannins, saponins, and mucilage. Food-grade ethanol must be used, diluted with distilled water to reach the target percentage. Vodka (40% ethanol) can work for leaves and flowers but lacks adjustability.

Alternatively, a glycerin extraction using 60% glycerin / 40% water is possible, though it yields lower potency and has a shorter shelf life of one to two years. It’s best suited for alcohol-sensitive applications. Regardless of the method chosen, proper drying herbs before extraction is essential. Following extraction, filtering and clarifying removes particulate matter, and careful storing extracts ensures stability. Always prioritize solvent safety.

Which extraction method suits lemongrass, and why?

Lemongrass presents unique considerations when [choosing a method] due to its complex chemical profile. The plant yields both volatile oils and water-soluble phenolics like luteolin and chlorogenic acid. Extraction must account for this duality.

Given the dominance of citral within the essential oil, up to 79.69% in some analyses, steam distillation is a primary route for capturing these aromatic compounds, detailed in [essential oils]. This method efficiently isolates volatile constituents. However, it will not extract the flavonoids and phenolic compounds present in the leaf material.

For those water-soluble components, an ethanol tincture offers versatility. A 40-50% ethanol solution with 50-60% distilled water would be appropriate for extracting a broad spectrum of lemongrass’s bioactive constituents. This ratio targets flavonoids, phenolics and most general-purpose herbs. Using food-grade ethanol is critical; denatured alcohol is unacceptable due to toxicity.

While glycerin extraction [glycerin extraction] could capture some compounds, it's less efficient than ethanol and yields a product with lower potency and a shorter shelf life (1-2 years). Glycerin also isn’t ideal for extracting resins or volatile oils. Apple cider vinegar would be unsuitable as a general method; its strengths lie in mineral extraction from herbs like nettles.

The choice between focusing on the essential oil via steam distillation, or a broader profile with an ethanol tincture depends on the desired final product. A complete extraction might involve both methods to maximize yield of all target compounds. Remember that composition varies by source and method; geographical area, age, genetics and extraction technique all play a role. Proper [drying herbs] is essential before any solvent-based extraction begins.

What solvent and ratio should you use for lemongrass?

Lemongrass presents multiple extraction options depending on desired constituents and final product. The plant contains both volatile oils and water-soluble phenolics, demanding careful consideration of solvent choice. [choosing a method]

For capturing the characteristic lemon scent and primary bioactive compounds like citral, an ethanol tincture is appropriate. Lemongrass essential oil comprises cyclic and acyclic monoterpenes; therefore, a higher proof alcohol will best dissolve these. Use 90-95% ethanol diluted with 5-10% distilled water to target resins, oleoresins, volatile oils, and gums present in the plant material.

Alternatively, a 60-70% ethanol solution with 30-40% water will extract alkaloids, most glycosides, and bitters - though lemongrass is not known for high alkaloid content. A 40-50% ethanol mixture with 50-60% water suits flavonoids, phenolics, and general-purpose herbal extraction. This would capture luteolin, quercetin, kaempferol, and apigenin alongside some of the volatile oil components.

Vodka (40% ethanol) is adequate for leaves and flowers but may not efficiently extract all desired compounds from lemongrass. Glycerin extraction [glycerin extraction] is possible, using a 60% glycerin / 40% water ratio, though potency will be lower than with alcohol. A solvent like apple cider vinegar isn’t ideal here; it excels at mineral extraction, which isn't the primary goal with lemongrass.

Regardless of ethanol percentage chosen, use food-grade ethanol only. Proper [solvent safety] measures are essential when working with flammable liquids. Following extraction, consider filtering and clarifying to remove particulate matter before storing extracts.

How do you make a lemongrass extract step by step?

Lemongrass extracts begin with properly prepared plant material. Thoroughly drying herbs ensures stability and prevents mold growth before extraction. The choice of solvent dictates the final product; consider target compounds when choosing a method.

For a standard alcohol tincture, use food-grade ethanol. Everclear (190 proof / 95% ethanol) or organic grape alcohol are suitable starting points. Lemongrass’s volatile oil and flavonoids respond well to an ethanol percentage between 40-50%, requiring dilution with distilled water to achieve the target ratio of 50-60% water. A 60-70% ethanol solution is also viable for broader compound capture.

Combine plant material with the chosen solvent in a clean glass jar, ensuring the herbs are fully submerged. A common ratio isn’t specified, but consistent weight/volume ratios improve repeatability. Seal tightly and store in a cool, dark place. Agitate daily to encourage extraction.

Extraction time varies; allow several weeks for complete compound transfer. After sufficient maceration, filtering and clarifying removes plant matter. Multiple filtration stages using increasingly fine filters yield a clear extract.

For those avoiding alcohol, a glycerin extraction is possible, though potency will be lower. Use a 60% glycerin / 40% water mixture. Shelf life will be shorter, around one to two years.

Concentrating the liquid requires careful solvent removal via evaporating solvent. Low heat and gentle airflow are essential to preserve volatile compounds like citral. Store finished extracts in airtight, dark glass bottles at a cool temperature; follow guidelines for storing extracts to maximize shelf life. Always prioritize solvent safety.

Who should be careful with lemongrass?

Individuals taking medications should exercise caution with lemongrass. Research indicates that lemongrass essential oil and its primary component, citral, can modulate P-glycoprotein efflux pumps [STUDY], potentially affecting drug metabolism. This interaction could alter the effectiveness of certain pharmaceuticals.

Those with sensitivities or allergies to grasses or other plants in the Poaceae family should also approach lemongrass cautiously. While not specifically detailed in available data, cross-reactivity is possible.

Lemongrass possesses anxiolytic properties demonstrated at a dose of 10 mg/kg in rodent studies [STUDY]. This suggests potential central nervous system effects; individuals with pre-existing anxiety or those taking sedative medications should monitor their response carefully. Traditional use notes its hypnotic and anticonvulsant properties in Brazilian folk medicine [TRADITIONAL], further highlighting possible neurological activity.

Gastrointestinal considerations are relevant. While traditionally used to reduce gastrointestinal problems [TRADITIONAL], a mouse ulcer model showed varied effects of lemongrass components - essential oil and geraniol reduced ulcer area, but citral did not accelerate healing [STUDY]. This suggests individual constituents have different impacts on the digestive system.

When preparing extracts, understand that composition varies significantly based on source, age of plant material, extraction method and genetics [ESTABLISHED]. An Egyptian GC analysis found 97.83% of essential oil comprised 22 chemicals, with citral representing 79.69% [STUDY]. This variability means potency can differ between batches.

For those considering a home preparation, remember that different solvents target different compounds; ethanol is versatile but requires careful attention to percentage - 25-30% ethanol for tannin and saponin rich herbs, up to 90-95% for resins [ethanol tincture]. Glycerin extraction [/articles/glycerin-extraction] offers an alcohol-free alternative, though with reduced potency. Always prioritize solvent safety when working with alcohols.

Before any solvent work: use glass or stainless steel rated for the solvent, work outdoors or beside a fan pulling the vapour away from you, heat ethanol only on an electric or induction hot plate (never an open flame or a gas burner), and do not breathe solvent vapour. This guide is education, not medical advice: check with a doctor before using any herbal extract alongside medication, during pregnancy or for a child.

How do you store a lemongrass extract, and how long does it keep?

Lemongrass extracts require careful storage to maintain potency. The best approach depends on the solvent used during creation. An ethanol tincture will last five years or more if stored correctly. Use dark glass bottles, tightly sealed, and keep them in a cool, dark place away from direct sunlight.

If you created a glycerin extraction, the shelf life is shorter, expect one to two years. Glycerine’s higher water content encourages microbial growth, so observe for any changes in appearance or smell. Proper storage still means dark glass and cool temperatures.

Extracts made with other solvents like oil require different handling. A oil infusion is susceptible to rancidity; refrigeration extends its life but does not guarantee indefinite preservation.

The ethanol percentage of your solvent impacts stability. A tincture using 90-95% ethanol will be more stable than one made with a lower proof spirit, like vodka at 40% ethanol. Adjusting the ratio is not possible once you begin.

Regardless of method, always prioritize protecting extracts from light, heat and air. These factors degrade volatile compounds like citral, which contributes to lemongrass’s characteristic aroma and activity. Remember that composition varies by source; a sample analysis identified 22 chemicals in one Egyptian oil, with citral representing 79.69% of the total. Preserving these constituents is key.

Proper drying herbs before extraction minimizes water content and extends shelf life. After extraction, complete filtering and clarifying removes particulate matter that can contribute to degradation. Finally, consider storing extracts in smaller bottles to minimize headspace and oxygen exposure.

Which guides go with this one?

Sources

  1. TRADITIONAL Documented medicinal use - Lemongrass was one of the herbs that was transported along the spice route from Asia to Europe. Lemon
  2. TRUSTED anxiety - In clinical studies, lemongrass tea did not lower anxiety or produce calming effects. (MSK About Herbs
  3. Herbal Reality —
  4. | propagation | Division Seed | |