Lemongrass – A Versatile Herb in Modern Life

1. Lemongrass (Cymbopogon): A Small Plant with Remarkable Value

Lemongrass is one of the rare plants that nearly every household has used at some point, yet few truly understand its full value. Most people are familiar with adding a few stalks to a pot of soup, using it for herbal steam baths, or placing a bundle at the doorway to repel insects often without realizing that behind its familiar aroma lies a comprehensive system of health, economic, and industrial value.

On a global scale, lemongrass is far more than a staple of Southeast Asian cuisine. It serves as a raw material for essential oils, natural cosmetics, traditional herbal medicine, and the rapidly growing spa and wellness industry. A plant that appears humble and commonplace is, in fact, deeply embedded in high–value-added supply chains.

This article goes beyond the simple question of “what is lemongrass used for.” It examines lemongrass from multiple perspectives: its biological characteristics, active compounds, scientifically recognized health benefits, and the ways humans cultivate, process, and apply it in modern life. Through this comprehensive view, it becomes clear why lemongrass deserves to be regarded as far more than just an ordinary culinary herb.

2. Lemongrass – Origins and How Humans Identify This Plant

2.1. What Is Lemongrass, Really?

From a botanical perspective, lemongrass is not a spice plant in the conventional sense, but a perennial tropical grass that thrives in sunny conditions and well-drained soil. It grows in dense clumps and regenerates continuously over many years without the need for replanting.

The name “lemongrass” does not derive from a sour taste, but from its distinctive aroma: fresh and bright, with a subtle lemon nuance that is neither sharp nor acidic, carrying a warm and lingering depth. This unique aromatic profile is precisely what makes lemongrass highly valued in both culinary applications and the fragrance industry.

Within the Cymbopogon genus, the two most widely used types of lemongrass are:

• Cymbopogon citratus: the common culinary lemongrass used in cooking, herbal teas, and traditional remedies.
• Cymbopogon flexuosus: a high–essential-oil variety cultivated primarily for large-scale industrial distillation.

Morphologically, lemongrass features long, slender, sharp-edged leaves with a slightly rough texture to the touch. The base of the plant is swollen and tightly layered, typically creamy white or faintly purplish in color. This basal section is where essential oils and bioactive compounds are most concentrated, determining both the plant’s characteristic aroma and its medicinal value.

2.2. Distinguishing Common Types of Lemongrass

Not all lemongrass available on the market is cultivated for the same purpose. In practice, lemongrass is broadly divided into two main usage groups, each serving a distinctly different value chain.

This distinction explains why lemongrass may appear similar at first glance, yet differ significantly in aroma, application, and economic value depending on its intended end use.

3. Core Nutritional Value of Lemongrass

Many people mistakenly believe that lemongrass serves only as a flavoring agent. In reality, lemongrass is a rich source of micronutrients. According to data from the United States Department of Agriculture (USDA), lemongrass contains a variety of essential vitamins and minerals that contribute to its overall nutritional profile.

Nutritional Composition of Lemongrass (Fresh, 100 g – USDA Data)

Note: Although lemongrass contains a relatively high concentration of nutrients, it is typically not consumed in large quantities like leafy vegetables. Therefore, its greatest value lies not in macronutrient intake, but in its essential oils and bioactive compounds, which are most effectively obtained through infusions, teas, and culinary use as a seasoning.

4. Eight Key Health Benefits of Lemongrass Recognized by Science

Lemongrass is not considered a “curative medicine,” yet for decades it has attracted significant attention from modern medical research due to its bioactive compounds, which exert measurable effects on multiple physiological systems. Below are the benefits that have been studied and documented to varying degrees of scientific evidence.

4.1. Anti-Inflammatory Effects

Lemongrass particularly lemongrass essential oil (LEO) exhibits strong anti-inflammatory activity through multiple mechanisms:

• Inhibition of nitric oxide (NO) production and inducible nitric oxide synthase (iNOS) in inflammatory cells.

• Significant reduction of acute inflammation in animal models (ear and paw edema), with reported efficacy exceeding 70%.

• Suppression of key inflammatory signaling pathways such as NF-κB, p38 MAPK, and JNK, mediated by flavonoids and polyphenols.

• Reduction of pro-inflammatory cytokines (TNF-α, IL-1β, IL-6, IL-16, MMP-9) and upregulation of anti-inflammatory cytokines (IL-10).

• Improvement of intestinal inflammation through modulation of the gut microbiota (decreasing pathogenic bacteria while promoting lactic acid bacteria).

• Neuroprotective effects, helping reduce inflammation associated with Parkinson’s disease, arthritis, and peritonitis.

Conclusion: Lemongrass is a rich natural source of bioactive compounds with strong potential for the prevention and supportive management of inflammatory conditions, acting through multi-level mechanisms at the cellular, tissue, and microbiome levels. (1)

4.2. Anticancer Potential of Lemongrass

Lemongrass, particularly its major compound citral, has demonstrated notable anticancer potential with low toxicity toward normal cells:

• Lemongrass and citral inhibit the growth of various cancers, including colon, liver, breast, lung, and prostate cancers, while exhibiting minimal toxicity to healthy cells.

• Primary mechanisms include induction of apoptosis via the mitochondrial pathway (↓ Bcl-2, ↑ Bax and Caspase-3), cell-cycle arrest at G0/G1, inhibition of cancer cell migration and colony formation, increased reactive oxygen species (ROS), and suppression of the NF-κB signaling pathway.

• In vivo studies in mice show that lemongrass extracts can reduce tumor growth by approximately 35–36% in certain cancer models.

• Lemongrass holds promise as a natural anticancer resource for functional foods and supportive therapeutic applications.

Current limitations: Most studies focus on isolated citral, with limited data on the synergistic effects of flavonoids and polyphenols. In vivo mechanisms, immune interactions, and clinical trials remain insufficient and require further investigation. (2)

4.3. Antioxidant Activity

Lemongrass essential oil (LEO) and lemongrass extracts exhibit significant antioxidant and neuroprotective properties:

• LEO enhances endogenous antioxidant systems (GSH, CAT, SOD, GPx) while reducing markers of oxidative stress (MDA, ROS, NO).

• Compounds such as citronellal and citronellol protect mitochondrial function, improve endothelial dysfunction, and reduce oxidative damage in neurological and metabolic disease models.

• In animal studies, LEO improves memory and learning ability, reduces oxidative brain damage, and supports blood pressure regulation.

• However, the direct free-radical scavenging capacity (DPPH, ABTS) of LEO is generally weaker than that of vitamin C and depends heavily on terpenoid content. (3)

4.4. Antimicrobial Properties

Lemongrass essential oil (LEO), along with aqueous and ethanol extracts, demonstrates strong antibacterial and antifungal activity against a wide range of pathogenic microorganisms:

• LEO shows low MIC and MBC values, indicating high inhibitory efficacy; citral is the most potent antifungal compound among its major constituents.

• The primary mechanisms include disruption of cell membranes, increased permeability, leakage of proteins and soluble sugars, inhibition of key enzymes, induction of oxidative stress, and subsequent microbial cell death.

• The vapor phase of lemongrass essential oil exhibits significantly stronger antimicrobial effects than liquid or solid forms (30–70% higher, and up to 7.7-fold stronger against certain fungi).

• Potential applications include food preservation, medical disinfection, and plant disease control.

Limitations: Genetic-level mechanisms and the risk of microbial resistance require further study. Optimization of vaporization techniques and carrier materials is also needed. (4)

4.5. Immune Modulation and Immune Enhancement

Lemongrass extracts and lemongrass essential oil (LEO) possess immunomodulatory properties that help strengthen the body’s defense mechanisms:

• LEO influences white blood cell and lymphocyte counts, contributing to improved resistance against infections.

• LEO demonstrates DNA-protective effects and potential anticancer activity in animal models.

• Dietary supplementation of LEO in poultry (chickens, quail) enhances cellular immunity, improves lipid metabolism, reduces mortality rates, and supports overall health.

• Components of LEO and polysaccharides derived from lemongrass stimulate the expression of immune-related cytokines (IL-1β, IL-2, IL-6, IL-12, TNF-α), thereby enhancing non-specific immunity and inhibiting tumor growth. (5)

5. Lemongrass in Cuisine: The Soul of Asian Flavors

In culinary arts, lemongrass acts as a “conductor,” orchestrating and harmonizing flavors. It is not as sharp as ginger nor as pungent as garlic; instead, it offers a refined, aromatic brightness that balances the palate and elevates a dish without overpowering it.

5.1. Proper Lemongrass Preparation — A Chef’s Approach

To fully unlock the flavor of lemongrass, proper preparation is essential:

• Trim: Remove the hard root end and the tough upper green leaves (these leaves can be reserved for making stock or herbal tea).

• Peel: Strip away 1–2 outer layers until the tender, pale inner core is exposed.

• Bruise: Lightly crush the white stalk with the flat side of a knife to release the essential oils before chopping or cutting into segments. This is the most critical step.

5.2. Dishes That Are Incomplete Without Lemongrass

• Vietnamese cuisine: Bò kho sả ớt (lemongrass chili beef stew), gà kho sả (lemongrass braised chicken), nghêu hấp sả (steamed clams with lemongrass), and chả ốc nướng sả (grilled snail cakes with lemongrass). Lemongrass is especially effective at neutralizing the fishy odors of seafood and meats.

• Thai cuisine: Tom Yum Goong (hot and sour shrimp soup) and classic Thai curries such as green curry and red curry would lose their “soul” without the distinctive aroma of lemongrass.

• Modern Western cuisine: Western chefs are increasingly incorporating lemongrass into pan-seared fish sauces and BBQ marinades to create a refined tropical flavor profile that feels both fresh and contemporary.

6. Lemongrass Essential Oil: The “Green Living” and Wellness Trend

If fresh lemongrass is the king of the kitchen, then lemongrass essential oil is the queen of home care and therapeutic applications.

6.1. Odor Elimination and Air Purification

Lemongrass essential oil is among the most powerful natural deodorizing agents.

• How to use: Add 3–5 drops to an essential oil diffuser or aroma burner.

• Benefits: Effectively eliminates musty odors, cigarette smoke, and kitchen smells, creating a clean, refreshing living space reminiscent of a resort environment.

6.2. A Safe, Natural Insect Repellent

Instead of chemical-laden insect sprays, lemongrass offers a safer alternative for households with children. The high levels of citral and geraniol in lemongrass disrupt the nervous systems of mosquitoes and ants.

• Applications: Dilute lemongrass essential oil in water for floor cleaning, or spray it directly into dark corners and insect-prone areas of the home.

6.3. Skin and Hair Care Therapy

• Acne treatment: Thanks to its antibacterial properties, a single drop of lemongrass essential oil diluted with a carrier oil (such as coconut or jojoba oil) and applied to blemishes may help reduce inflammation and swelling.

• Dandruff control: Adding a few drops of lemongrass essential oil to shampoo helps cleanse the scalp, reduce excess oil, combat dandruff, and promote healthier, stronger hair growth.

7. How to Brew Lemongrass Tea for an Effective Detox

Lemongrass tea is a globally popular detox beverage, valued for its refreshing taste and cleansing properties. Below is a simple yet highly effective brewing method.

Ingredients

• 3 – 4 fresh lemongrass stalks (white lower portion only)

• 1 tea bag (green tea or black tea) – optional

• Honey or rock sugar, to taste

• A few slices of fresh lemon and mint leaves

• 1 liter of water

Instructions

1. Rinse the lemongrass thoroughly, lightly bruise the stalks, and cut them into approximately 5 cm segments.

2. Bring the water to a boil, add the lemongrass, then reduce to a gentle simmer for about 10 minutes to fully release the essential oils.

3. Turn off the heat and steep the tea bag for 3–5 minutes, if using.

4. Strain the liquid into a cup or teapot. Add honey and lemon according to taste.

5. Enjoy hot, or serve over ice for a refreshing cold version.

Tip: Drinking a warm cup of lemongrass tea after a heavy, oily meal may support digestion and help reduce excess fat accumulation.

8. How to Grow and Care for Lemongrass at Home

Lemongrass is exceptionally easy to grow, drought-tolerant, and relatively resistant to pests and diseases. You can comfortably cultivate a healthy clump of lemongrass on an apartment balcony or in a small garden corner.

8.1. Preparation

• Planting material: Purchase fresh lemongrass stalks from the market with intact root bases (fresh, not dried or wilted).

• Soil: Lemongrass thrives in loose, well-draining soil. Enrich the soil with organic compost or vermicompost for optimal growth.

8.2. Planting Method (Hydro–Soil Combination)

• Root stimulation: Trim off the upper leaves, leaving about 15 cm of the stalk. Place the root base in a glass of clean water and keep it in a cool, well-lit area with indirect sunlight. Change the water daily.

• Root development: After approximately 3–5 days, white roots will begin to emerge from the base.

• Transplanting to soil: Once the roots reach 2–3 cm in length, transplant the stalk into a soil-filled pot. Cover the roots completely and water thoroughly.

8.3. Care Guidelines

• Light: Lemongrass prefers full sun. Place the plant in an area that receives at least 6 hours of direct sunlight per day.

• Watering: Water 2–3 times per week. While lemongrass is drought-tolerant, it does not tolerate waterlogging.

• Harvesting: After 3–4 months, when the clump becomes well established, you can harvest the thicker stalks as needed. New shoots will continue to grow, ensuring a continuous supply.

10. Conclusion: Lemongrass – A Green Solution for a Balanced Life

Lemongrass is far more than a simple culinary herb; it is a priceless gift from nature that supports both the physical health and mental well-being of modern lifestyles. From awakening the palate in everyday meals, to easing stress after long working hours through its therapeutic aroma, and even protecting households from harmful insects, lemongrass fulfills its role with remarkable versatility and effectiveness.

Integrating lemongrass into daily life is a simple yet powerful step toward a “Green – Clean – Healthy” lifestyle. Whether it begins with a small pot of lemongrass on your balcony or a bottle of lemongrass essential oil in your living space, the positive impact can be felt almost immediately.

Partner with Great Farmer to access premium, sustainably grown Vietnamese lemongrass trusted quality, transparent sourcing, and reliable supply for global food, wellness, and industrial markets.
Contact us:
📞 Phone / WhatsApp: +84 785 017 575 | +84 778 078 134 | +84 033 531 3567
📧 Email: mia@greatfarmer.com.vn | clay@greatfarmer.com.vn | loan@greatfarmer.com.vn
🌐 Website: www.greatfarmer.com.vn