Lemongrass

The honest answer: lemongrass has a compelling traditional profile, promising early-stage science, and limited large-scale human clinical trials — a combination that calls for measured enthusiasm rather than bold claims. Here is what the evidence actually shows, area by area. Digestive health and the microbiome This is where lemongrass has its deepest traditional roots. Across multiple healing traditions — Ayurvedic, Chinese, Latin American folk medicine — lemongrass tea or infusions have been used for bloating, gas, stomach cramps, and colic. The mechanism makes intuitive sense: volatile oils like citral may have mild antispasmodic (muscle-relaxing) and carminative (gas-dispersing) effects on the gut, helping ease cramping and the discomfort of trapped gas. There are no large, well-controlled human trials to confirm these effects yet. The evidence base is primarily traditional use, herbal monograph observations, and early mechanistic research. That said, the risk of sipping a cup of lemongrass tea with a meal is very low, and the potential for gentle digestive comfort is plausible enough to make it a worthwhile kitchen ritual for many people. Circulation and heart health Traditional herbal descriptions often describe lemongrass as a herb that "invigorates circulation" — warming peripheral blood flow and being used historically for sluggishness, cold extremities, and hypertension (high blood pressure) in folk medicine contexts. Modern scientific support for these cardiovascular claims is thin. The available sources note that clinical research specifically measuring blood pressure, cholesterol, or cardiovascular events from lemongrass consumption is limited. For now, the most defensible position is to enjoy lemongrass as part of a flavorful, vegetable-forward cooking pattern that is broadly supportive of heart health — not as a standalone cardiovascular intervention. Blood sugar and metabolism Lemongrass appears in folk medicine traditions for obesity management and blood sugar balance, which has attracted some scientific interest. Ethnobotanical and preclinical (laboratory and animal) research has investigated potential metabolic effects, but well-designed human trials measuring fasting glucose, HbA1c (a three-month blood sugar marker), or insulin response specifically from lemongrass are not yet established in the research literature. Within a culinary framework, lemongrass is a wonderful way to add bold flavor to soups, stir-fries, and curries that are themselves built on whole-food, plant-based ingredients supportive of metabolic health. Inflammation and recovery Herbal monographs describe lemongrass essential oil compounds as having analgesic (pain-reducing) and anti-inflammatory properties, and the herb has traditional applications for arthritic pain, nerve irritation, and general soreness — linked to its warming, antispasmodic, and circulation-enhancing character. Controlled human trials measuring inflammation biomarkers (such as CRP or IL-6) or pain scores from lemongrass consumption are not yet in the evidence base reviewed here. Messaging around inflammation should stay soft: lemongrass is a warming, soothing herb well suited to broths and teas, not a documented anti-inflammatory treatment. Antimicrobial and antifungal activity This is perhaps lemongrass's most interesting area from a research standpoint. In vitro (laboratory) studies have found that lemongrass compounds inhibit the growth of various bacteria and fungi. One human clinical study found that a lemongrass preparation was effective at reducing oral thrush (a fungal infection caused by Candida overgrowth in the mouth) in HIV-positive patients — a notable finding, even if it applies to a specific population and preparation method. Research into anticancer properties of lemongrass constituents exists in experimental models, but no human trial evidence currently supports that framing.

For a culinary and kitchen-wellness focus, you really do not need anything more complex than fresh or dried stalks. Fresh lemongrass stalk is the gold standard for flavor. Peel the tough outer leaves, trim the woody green top, and use the pale lower 10–15 cm (4–6 inches). Slice thin, bruise with the back of a knife, or crush with a mortar and pestle to release its oils. It infuses beautifully into curries, soups, marinades, and congee. Dried lemongrass (cut and sifted) is more convenient and shelf-stable. It is ideal for herbal teas and dry spice blends. The flavor is slightly more muted than fresh. Lemongrass tea bags are a ready-made option for convenience, though quality varies — look for single-ingredient products with no artificial flavors. Essential oil and infused oils are for topical or aromatic use only (massage, skincare, insect repellent). They are highly concentrated and are not intended for internal use without professional guidance.

Because this is a culinary ingredient rather than a supplement, there is no established therapeutic dose. What we have instead are time-tested culinary amounts that align with traditional recipes and a reasonable safety margin: For lemongrass tea: Use approximately 1–2 tablespoons of chopped fresh stalk, or 2 teaspoons of dried cut lemongrass, per cup (about 240 ml) of just-boiled water. Steep for 10–15 minutes, then strain. One to two cups per day is a common and reasonable approach for most healthy adults. For cooking: One to two bruised stalks or about one tablespoon of finely

Lemongrass provides antibacterial, analgesic (pain-relieving), and antipyretic (fever-reducing) effects primarily through its high concentration of citral. These properties, along with antioxidant flavonoids and limonene, support the body’s ability to manage minor infections, fevers, and oxidative stress.

To prepare fresh lemongrass, remove the dry outer leaves and root end, then either slice the pale inner stalk into thin rounds or bruise it whole to release aromatic oils. If you use whole bruised stalks in soups or curries, remember to remove them before serving as they remain woody.

Lemongrass is a natural insect repellent due to its citronella-type terpenoids, which are volatile organic compounds also found in citronella oil. These compounds are frequently used in topical and aromatic preparations to deter insects.

Lemongrass pairs exceptionally well with ginger, coconut milk, turmeric, garlic, and chili to create flavorful and health-supportive bases for soups and marinades. A popular combination includes lemongrass, turmeric, and black pepper, which may enhance the anti-inflammatory benefits of curcumin.

Fresh lemongrass stalks typically stay fresh for up to two weeks when wrapped tightly in the refrigerator or can be frozen for up to three months. Dried lemongrass should be stored in an airtight container away from light and heat, where it will maintain its quality for about a year.

While culinary amounts of lemongrass are generally safe during pregnancy, you should avoid high-dose extracts and consult a healthcare provider regarding regular herbal use. There are currently limited systematic long-term safety studies regarding high-intake medicinal lemongrass for pregnant or breastfeeding individuals.

Lemongrass contains citral, limonene, and various flavonoids, which are active compounds linked to antimicrobial and antioxidant activity. These essential oil fractions and polyphenolic molecules give the plant its characteristic lemon scent and its studied therapeutic potential.

In the United States, fresh lemongrass is a staple at Asian grocery chains like H Mart, 99 Ranch Market, and Mitsuwa, as well as mainstream retailers like Whole Foods and Kroger. You can usually find it in the produce section near other aromatics like ginger and fresh turmeric.

Lemongrass grows best in USDA plant hardiness zones 8b through 11, making it a perennial crop in southern states like Florida, Texas, and California. While it thrives in the heat and humidity of the South, northern gardeners can grow it as an annual or in pots to bring indoors.

When buying lemongrass in the US, look for the USDA Organic seal to ensure it was grown without synthetic pesticides or fertilizers. The FDA regulates lemongrass under its "Generally Recognized as Safe" (GRAS) list for use as a natural flavoring and food additive in commercial products.