Hands pouring hot water over fever grass in teapot

Fever Grass Tea Benefits: What the Evidence Really Shows

August 24, 2026 TOJEXPRESS.COM-Antonio Henry

Fever grass tea, better known outside the Caribbean as lemongrass tea, has real backing for antioxidant, anti-inflammatory, digestive, and mild blood-pressure benefits. Most of that backing, though, comes from lab dishes and rodent studies rather than large human trials, and readers should treat every claim below with that filter on. The evidence is promising enough to justify a daily cup. It isn’t strong enough to call fever grass tea a treatment for anything.

Three benefits stand out as the best-supported and most worth understanding before the rest:

Blood pressure and heart rate: a small human trial found a measurable drop in both.
Oral and antimicrobial health: lemongrass oil outperformed a standard mouthwash in a 2023 study.
Antioxidant and anti-inflammatory activity: driven by citral and flavonoids, confirmed mostly in lab models.

Key Takeaways

Fever grass tea’s best-supported effects, on blood pressure and oral bacteria, come from small human and oil-based trials, while most other claimed benefits rest on lab and animal research.

Point	Details
Blood pressure effect is real but small	A 2011 trial of 72 men showed a moderate systolic drop versus green tea, not a treatment-level result.
Oral health data uses oil, not tea	The 2023 mouthwash study tested concentrated lemongrass oil, so results don’t directly translate to brewed tea.
Most benefits are preclinical	Antioxidant, anti-inflammatory, digestive, and anticancer claims mostly rely on lab or animal studies.
Brew the stalk, not just the leaves	Slice the woody lower stalk, boil about five minutes, then steep to pull out more active compounds.
Check interactions before daily use	Anyone on blood pressure medication, diuretics, or blood thinners should ask a doctor first.
Tojexpress carries the real ingredient	Fever grass and pairing teas like ginger and hibiscus are available in-store and online for Atlanta-area shoppers.

Fever Grass Tea Health Benefits, Ranked by Evidence Quality
How to Brew Fever Grass Tea for Maximum Benefit
Is Fever Grass Tea Safe? Side Effects and Interactions
What the Research on Fever Grass Actually Supports
A Grounded Take on Working Fever Grass Into Your Routine
Where to Find Fever Grass Tea and Caribbean Pantry Staples
Sources

Fever Grass Tea Health Benefits, Ranked by Evidence Quality

Fever grass earns its reputation from a specific set of plant compounds, and the strength of each claimed benefit tracks closely with how those compounds were tested, whether in a petri dish, a rat, or an actual person drinking tea.

Antioxidant activity. Cymbopogon citratus, the botanical name for lemongrass, contains citral, flavonoids, and phenolic compounds that neutralize free radicals in laboratory assays. Reviews on the plant’s therapeutic basis point to these compounds as the likely drivers behind most of the plant’s reputed effects, though the jump from a test tube to a teacup is not automatic.
Antimicrobial and oral health effects. This is where the evidence gets genuinely interesting. A 2023 trial found that a mouthwash made with lemongrass oil reduced plaque and improved gum health compared with chlorhexidine, the gold-standard antiseptic dentists have relied on for decades. That’s a concentrated oil rinsing directly against teeth and gums, not a diluted tea passing through your mouth once. Still, it’s a rare case where lemongrass beat a pharmaceutical benchmark rather than just a placebo.
Anti-inflammatory effects. Citral appears to suppress certain inflammatory markers in cell and animal studies, giving a plausible mechanism for why fever grass shows up in folk remedies for aches, fevers, and swelling.
Blood pressure and cardiovascular effects. In a 2011 trial involving 72 male volunteers, drinking lemongrass tea produced a moderate drop in systolic blood pressure and a lower heart rate compared with green tea. That’s one of the only controlled human trials in this entire category, and it’s worth sitting with: 72 men, one outcome measure, no long-term follow-up. Encouraging, not definitive.
Digestive benefits. Traditional use across the Caribbean and Southeast Asia leans heavily on fever grass for bloating, cramps, and nausea. A 2012 rodent study found that lemongrass essential oil helped protect the stomach lining from certain chemically induced ulcers, which supports the folk logic but stops well short of proving anything in humans.
Diuretic effects. Many drinkers report needing the bathroom sooner after a cup, consistent with a mild diuretic effect. That water loss can look like weight loss on a scale the next morning. It isn’t fat loss, and the effect fades once you stop drinking it.
Anticancer signals. Citral has slowed the growth of certain cancer cell lines in lab studies. This is early-stage cell research, years away (if ever) from translating into a human benefit, and it says nothing about drinking tea versus taking concentrated citral extracts.
Cholesterol and metabolism. Some preclinical work suggests lemongrass compounds may influence lipid metabolism in animal models. No human trials currently test whether tea consumption meaningfully changes cholesterol numbers.
Menstrual cramps and milk production. Folk traditions use fever grass for period pain and, less commonly, as a galactagogue to support breastfeeding. Supporting research here is thin, mostly small or anecdotal, and shouldn’t override guidance from a doctor or lactation consultant.
Relaxation and anxiety. The warm, citrusy aroma and the ritual of tea drinking produce a real, if modest, calming effect for many people. That’s more sensory and behavioral than pharmacological. It doesn’t require a clinical trial to be worth doing.

How to Brew Fever Grass Tea for Maximum Benefit

Getting a good cup starts with which part of the stalk you use. The lower, woodier sections hold more of the essential oils than the leafy tops, so that’s where the flavor and the plant compounds concentrate.

Trim the woody base and slice it into half-inch to one-inch pieces to expose more surface area.
Bruise the pieces lightly with the back of a knife to help release oils.
Boil the sliced stalks in water for about five minutes, then reduce heat and let the mixture steep another five to ten minutes.
Strain and drink hot, or chill for an iced version.

Fresh stalks generally deliver the most flavor and aromatic oil content, dried cut lemongrass comes next, and tea bags tend to be the mildest and most inconsistent, since bag contents vary by brand. Pairing fever grass with ginger adds warmth and is a common combination in Caribbean kitchens; pairing it with green tea, as researchers did in the 2011 blood pressure study, gives you a caffeinated option with a similar herbal backbone. There’s no standardized clinical dose for fever grass tea, so most people rely on one to three cups a day as a reasonable, moderate habit rather than a prescribed regimen.

Pro Tip: Save the fibrous stalk pieces after your first steep. They still hold usable oils for a second, lighter infusion instead of going straight into the compost.

Is Fever Grass Tea Safe? Side Effects and Interactions

Fever grass tea is generally well tolerated in normal culinary amounts, but it isn’t risk-free for everyone. Reported side effects include mild stomach upset, dizziness, and dry mouth, mostly at higher intakes.

Pregnancy and breastfeeding: talk to a doctor first. Some traditional uses target menstruation and lactation specifically, which is exactly the reason to get individual medical guidance rather than general reassurance.
Blood pressure medication: because lemongrass tea lowered systolic blood pressure and heart rate in a controlled trial, combining it with hypotensive drugs could compound the effect.
Diuretics: stacking fever grass’s mild diuretic action on top of a prescribed diuretic raises the risk of dehydration or electrolyte imbalance.
Blood thinners: some plant compounds in lemongrass may interact with anticoagulants; anyone on warfarin or similar medication should check with a pharmacist.
Concentration matters: the studies showing the clearest antimicrobial punch used lemongrass oil in a mouthwash, not brewed tea. Don’t substitute concentrated essential oils for tea, and never ingest essential oil directly.

Stop and seek medical advice if you notice unusual dizziness, a fast or irregular heartbeat, or persistent digestive distress after drinking it regularly.

What the Research on Fever Grass Actually Supports

The strongest data point in this entire category remains the 2011 trial of 72 male volunteers, which measured a real, moderate reduction in systolic blood pressure and heart rate against a green tea comparison group. It’s a genuine signal. It’s also a single study, on one demographic, over a short window, which is why nobody credible calls fever grass tea a blood pressure treatment.

Fresh fever grass leaves on plate

The second-strongest data point is the 2023 mouthwash trial, where lemongrass oil edged out chlorhexidine on plaque and gum health. That result says more about concentrated oil applied topically in the mouth than about a cup of tea, a distinction worth repeating because marketing copy often blurs it.

Underneath both findings sits a layer of mechanistic research on citral, flavonoids, and phenolic compounds that explains why these effects are biologically plausible in the first place.

Reviewers studying medicinal plants consistently flag the same gap: promising lab and animal data with a real shortage of large, well-designed human trials to confirm it. Fever grass fits that pattern almost exactly, plausible mechanisms, small human signals, and a research base that hasn’t caught up to the folk reputation yet.

Human evidence: one meaningful blood pressure trial, one oral health trial.
Animal and lab evidence: gastric protection, anti-inflammatory markers, early anticancer cell work.
What’s missing: large-scale, long-term human trials on tea specifically, not just extracts or oils.

At Tojexpress, we track this kind of research because our shelves carry the Caribbean teas and ingredients tied to it, and Antonio’s take below reflects that same evidence-first approach.

A Grounded Take on Working Fever Grass Into Your Routine

Fever grass tea earns a spot in a normal week, not because it cures anything, but because the risk is low and the traditional use runs deep across Caribbean households. Antonio’s take: treat it the way you’d treat any herbal habit, one or two cups on most days, paired with Caribbean spices and other traditional staples rather than as a standalone fix. Moderation beats intensity here.

— ANTONIO

Where to Find Fever Grass Tea and Caribbean Pantry Staples

Sourcing fever grass that actually tastes and brews right starts with buying it fresh or properly dried, not a dusty bag that’s been sitting on a shelf too long. Tojexpress stocks fever grass alongside a wider lineup of Caribbean teas, seasonings, and pantry staples for households across Atlanta and nearby communities like Stone Mountain and Decatur.

Tojexpress

If you’re building a rotation, pairing fever grass with Caribbean Dreams Instant Ginger Tea gives you a warming combination that’s common in Caribbean kitchens, while a bag of Hibiscus Berry Tea offers a tart, caffeine-free alternative for days you want something different. Browse the Tojexpress online shop or stop into the store to pick up fever grass and the seasonings that go with it, and check what’s currently in stock before you plan your next brew.

Sources

This article is general information, not a substitute for advice from a qualified doctor. Consult a qualified healthcare professional about your own circumstances before acting on anything here.

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