Lemongrass tea can help soothe a sore throat through a combination of anti-inflammatory effects, mild pain relief, and antibacterial activity. It’s not a cure for the infection behind your sore throat, but the warm liquid combined with lemongrass’s active compounds offers more than just comfort. Here’s what the science actually supports.
How Lemongrass Reduces Throat Pain and Swelling
The soreness you feel in your throat is largely caused by inflammation, your immune system’s response to a viral or bacterial infection. Lemongrass contains citral, its primary active compound, which works by suppressing the release of key inflammatory signals in your body. Specifically, citral inhibits the production of proteins called IL-1β and IL-6, both of which drive the swelling, redness, and pain in irritated throat tissue. It appears to do this by blocking a master switch for inflammation known as NF-κB, a mechanism shared by many pharmaceutical anti-inflammatory drugs.
Beyond reducing swelling, lemongrass also has a direct pain-relieving effect. A compound called myrcene, found in the essential oil of lemongrass leaves, produces dose-dependent pain relief when consumed orally. Research in the Journal of Ethnopharmacology showed that a lemongrass leaf infusion (essentially the same thing as brewing tea from fresh leaves) reduced pain responses triggered by prostaglandins, one of the chemicals your body releases at sites of inflammation. Unlike opioid-based painkillers, myrcene works at the site of pain itself rather than in the brain, and it doesn’t cause tolerance with repeated use. This peripheral analgesic effect is one reason lemongrass tea has been used as a soothing remedy in folk medicine for generations.
Antibacterial Properties Worth Noting
Many sore throats are viral, but bacterial infections (like strep throat) are another common cause. Lemongrass essential oil has well-documented antibacterial activity against both gram-positive and gram-negative bacteria, as well as some yeasts and fungi. Citral, the same compound responsible for the anti-inflammatory effects, strongly inhibits bacterial growth at very low concentrations, with minimum inhibitory concentrations as low as 0.1 mg/mL in lab studies.
A cup of lemongrass tea delivers far less citral than what’s used in laboratory experiments on bacteria, so you shouldn’t expect it to clear a bacterial throat infection the way an antibiotic would. Still, swishing and slowly sipping the warm tea means the antibacterial compounds make direct contact with your throat tissues, which may help limit bacterial activity on the surface while your immune system handles the deeper work.
Nutritional Support During Illness
Lemongrass is naturally rich in vitamins A, C, and E, along with folate, niacin, riboflavin, and minerals like iron, zinc, and magnesium. Vitamin C and zinc are particularly relevant when you’re fighting off an infection, as both play central roles in immune cell function. A cup of tea won’t deliver massive doses of these nutrients, but it contributes to your overall intake during a time when you may not feel like eating much. The antioxidant content also helps counter the oxidative stress that ramps up during infection.
How to Brew It for Maximum Benefit
Getting the most out of lemongrass tea comes down to temperature and time. Brew it at 175 to 200°F (just below a full boil) and steep for 5 to 10 minutes. The intensity of flavor and the concentration of active compounds increase with steeping time, but the tea plateaus at a mild intensity around the 10-minute mark, so there’s no advantage to going longer.
You can use either fresh lemongrass stalks or dried lemongrass. For fresh stalks, bruise or slice two to three stalks to release the oils before steeping. For dried lemongrass, one to two teaspoons per cup is standard. Breathing in the steam as you sip adds a secondary benefit: the warm, moist air helps loosen congestion in your nasal passages and upper airways, which often accompanies a sore throat. Adding a slice of fresh ginger amplifies both the anti-inflammatory effect and the steam’s decongestant properties.
Honey is a natural pairing. It coats irritated throat tissue, has its own antibacterial qualities, and improves the flavor. A squeeze of lemon juice adds extra vitamin C. Sipping slowly, rather than gulping, keeps the warm liquid in contact with your throat longer.
Safety and Who Should Be Careful
For most adults, lemongrass tea is safe to drink several times a day. It’s caffeine-free, so it won’t interfere with the rest your body needs to recover.
Pregnant women should exercise caution. Lemongrass contains compounds that may stimulate menstrual flow and affect uterine tissue, which is why most herbalists and healthcare providers recommend sticking to small culinary amounts during pregnancy and avoiding medicinal doses entirely. The first trimester warrants the most caution.
If you take medications processed by the liver’s CYP450 enzyme system (a very broad category that includes many common prescriptions), drinking large amounts of lemongrass tea could theoretically slow the breakdown of those drugs and increase their effects. Memorial Sloan Kettering Cancer Center notes that standard culinary amounts are not a concern, but quantities beyond normal food use may warrant caution. The same applies to drugs that interact with glutathione-S-transferase enzymes. If you take multiple medications, keep your lemongrass tea consumption moderate: two to three cups a day is a reasonable ceiling.
What Lemongrass Tea Can and Can’t Do
Lemongrass tea is a genuinely useful home remedy for sore throat comfort. It reduces inflammation through specific biochemical pathways, provides mild pain relief through myrcene, offers some antibacterial activity, and delivers the basic hydration and warmth that any hot liquid provides for an irritated throat. It works best as part of your overall recovery strategy: staying hydrated, resting, and supporting your immune system with adequate nutrition.
What it can’t do is replace medical treatment for a bacterial infection like strep throat, which requires antibiotics to prevent complications. A sore throat that lasts more than a few days, comes with a high fever, or makes swallowing extremely difficult needs more than tea.