Steeping fresh or dried Cymbopogon citratus stalks in hot or cold water produces a caffeine-free infusion that has been used for centuries in traditional wellness practices. A standard cup delivers citral, trace polyphenols, and small amounts of potassium and magnesium at low concentrations, along with a mild citrus flavor. Most advertised wellness claims rest on concentrated extracts or animal models, not casual sipping, so the gap between marketing and evidence remains wide.
This guide covers what the cup actually contains, which benefits have real support, where the risks sit, and how to use lemongrass water without overdoing it.
What Lemongrass Water Actually Is and How It Differs From Tea
Cymbopogon citratus, and its close cousin Cymbopogon flexuosus, are tall tropical grasses with a sharp lemon scent driven by citral, the dominant compound in their essential oil. The drink you make at home is a simple infusion: stalks soaked in water, hot or cold, for a short time. That distinction matters, because every claim about lemongrass “water” traces back to research on three different things: the essential oil, concentrated extracts, and the steeped drink itself.
Infusion, Extract, or Essential Oil
An infusion pulls a small fraction of the plant’s water-soluble compounds into your cup. A laboratory extract uses solvents to concentrate those same compounds many times over. An essential oil is steam-distilled and contains citral at levels 100 to 1,000 times higher than what a steeped cup delivers. Treating the three as interchangeable is the single biggest mistake in most online guides, and it explains why dosage advice swings so widely from one source to the next.
The practical takeaway: a cup of lemongrass water is a flavorful, low-calorie drink, not a therapeutic dose. It shares the general chemistry of the plant but in trace amounts, so the everyday effect on your body is closer to a mild herbal tea than to a supplement.
Skip the idea that drinking lemongrass water equals taking lemongrass medicine. The concentration gap is the entire story.
The Compounds Inside a Cup and What They Do in the Body
What ends up in your cup is mostly water, a faint citrus note, and a short list of plant chemicals. Understanding those compounds is the only way to judge whether the claimed benefits make sense at the dose you actually consume.
Citral and the Polyphenols
Citral gives the drink its sharp lemony smell and is the most studied compound in the plant. Lab research shows citral can calm certain inflammatory pathways in cells and slow the growth of some bacteria and fungi. Polyphenols, a broad class of plant antioxidants, ride along in small amounts. Together they create the biological case for calling lemongrass a “wellness” ingredient, even if the effect from one cup stays modest.
The catch is concentration. A typical cup contains roughly 0.5 to 2 milligrams of citral, while the doses used in laboratory anti-inflammatory studies often sit in the 50 to 200 milligram range. That 25 to 100 times gap is the line between “plausible” and “demonstrated.”
Diuretic Effect and Hydration
Lemongrass contains mild diuretic compounds that nudge your kidneys to produce a bit more urine, which feeds the popular “detox” claim. Your liver and kidneys already handle detoxification, and any diuretic effect simply means slightly more bathroom trips. The hydration math still works in your favor, since the water you drink more than offsets what you lose.
That makes the drink a reasonable swap for sugary sodas or afternoon coffee, especially if you enjoy the flavor. A bottle of lemongrass water can replace a 140-calorie soda without leaving you jittery.
Evidence-Graded Benefits Worth Noting
Sorting the real benefits from marketing noise is easier when you grade each claim by the strength of the evidence behind it. The table below lays out the four most common claims, what kind of research supports them, and how much credit that research actually deserves.
| Claimed Benefit | Type of Evidence | Realistic Effect from Drinking the Infusion |
|---|---|---|
| Digestive comfort and less bloating | Modest human trials plus long traditional use in Ayurveda and Thai medicine | Most likely everyday payoff, especially after heavy meals |
| Blood sugar support | Animal studies and small human studies using concentrated extracts | Unconfirmed at normal cup doses |
| Anti-inflammatory and antioxidant activity | Cell and animal studies with citral and lemongrass extracts | Biologically plausible, dose-dependent |
| Weight loss and detox | No direct human evidence for lemongrass water specifically | Likely indirect, through hydration and calorie swapping |
The digestive effect tends to show up first in real life. A warm cup after a rich meal often feels soothing, and the same compounds that relax smooth muscle in cell studies are thought to contribute. Treat that benefit as a genuine plus rather than a miracle.
Blood sugar claims lean on studies where diabetic rats received lemongrass extract at doses that scale to several grams for a human, far more than any infusion supplies. The mechanism is real; the dose in your cup is not. Until human trials test it specifically, treat the blood sugar effect as a “may” rather than a “does.”
Weight loss and detox are the claims that travel farthest from the evidence. Any slimming effect almost certainly comes from drinking water instead of soda, plus the mild diuretic bump. The detox language has no clinical meaning here. Your liver and kidneys do that work with or without the cup.
Most of those modest gains rest on a thin evidence base, so the cautions that follow are worth weighing seriously.
Side Effects, Allergies, and Who Should Stay Away
Lemongrass sits in the Poaceae grass family, which also includes wheat, barley, and many common lawn grasses. That family connection matters for allergy risk and is something most wellness blogs skip.
Common Mild Reactions
Drinking large amounts, especially on an empty stomach, can trigger dizziness, dry mouth, stomach upset, or an unusually frequent need to urinate. These reactions are usually dose-driven, which means they tend to fade when you cut back to one cup a day or drink the infusion with food.
For most healthy adults, a cup or two a day is well tolerated. The trouble starts with people who treat it like a supplement and stack multiple cups alongside lemongrass tea, essential oil drops, and extract capsules without thinking about cumulative citral exposure.
Allergy and Skin Contact
Anyone with a known grass or cereal allergy should approach lemongrass with caution, because plant proteins overlap with other Poaceae members. Handling fresh stalks can also cause contact dermatitis in sensitive people, even when the drink itself causes no issue. Wear gloves when you trim a fresh bunch if you have ever reacted to grass pollen or to citronella, a closely related Cymbopogon species.
Pregnancy, Kidney, and Liver Concerns
Pregnant women are routinely advised to limit lemongrass intake, because traditional use and some animal data suggest the herb can stimulate uterine contractions, a real concern in the first and third trimesters. The FDA has not issued a formal warning, and the WHO monograph on lemongrass flags pregnancy as a precaution without naming a safe threshold, so most obstetric guidance suggests skipping the drink or keeping it to an occasional culinary amount.
People with existing kidney or liver conditions should also be cautious, both because of the diuretic load and because concentrated lemongrass compounds are processed through the liver. When in doubt, ask a physician who knows your full medication list.
Drug Interactions and How to Think About Dose
Drug interactions are where lemongrass moves from “harmless herbal drink” into territory that deserves a real conversation with your doctor. The compounds that make lemongrass interesting, especially citral and the diuretic fraction, can amplify or interfere with common prescription medications.
Medications That Can Interact
- Prescription diuretics: The mild diuretic effect of lemongrass can stack with water pills, raising the risk of dehydration or electrolyte imbalance.
- ACE inhibitors and blood pressure drugs: Some animal evidence suggests lemongrass can lower blood pressure, which may push readings too low when combined with these medications.
- Diabetes medications: Because lemongrass may lower blood sugar, pairing it with insulin or oral hypoglycemics can cause unexpected dips.
- Lithium: Diuretics can raise lithium levels in the blood, and lemongrass shares that diuretic behavior, so anyone on lithium needs medical supervision.
- Blood thinners like warfarin: Citral can influence liver enzymes that metabolize these drugs, potentially changing their effect.
If you take any of these medications, do not assume that a “natural” drink is automatically safe. A two-minute call to your prescribing clinician is worth more than a thousand articles.
Cumulative Citral Exposure
The dose used in many anti-inflammatory studies is roughly 100 milligrams of citral per kilogram of body weight in animal models, which scales to several grams for an adult human. A single cup of it delivers a tiny fraction of that. The danger is not in the cup itself; it is in stacking the cup with lemongrass tea, lemongrass extract capsules, and lemongrass essential oil drops on the same day, which can quietly push total citral into unclear territory.
A practical safety range for healthy adults with no relevant medical history is one to two cups of standard-strength infusion per day. First-time drinkers should start with one small cup and wait to see how your body responds before making it a daily habit.
If you are pregnant, on a prescription diuretic, or managing diabetes, treat it as a conversation with your doctor, not a default add-on.
Preparing Lemongrass Water at Home and Comparing It to Other Herbal Waters
Making the drink at home is the easiest way to control strength, freshness, and cost. It also gives you a clear baseline, since bottled “its” vary widely in how much actual plant they contain.
A Reliable Home Method
- Trim the stalks: Remove the tough outer leaves and cut one fresh stalk into 2-inch pieces, or measure about one tablespoon of dried lemongrass.
- Add water: Place the pieces in a pitcher with about two cups of cold or hot water.
- Steep properly: For hot water, steep covered for 8 to 10 minutes, then strain. For a cold infusion, refrigerate the pitcher for 4 to 8 hours for a smoother, less bitter flavor.
- Flavor and store: Add a slice of ginger, a few mint leaves, or a small spoon of honey if you want. Refrigerate any unused portion and drink within 24 hours.
Skip lemongrass essential oil as a shortcut. A single drop can contain more citral than an entire pitcher of properly steeped water, and the oil is not formulated for drinking. Oils labeled “food grade” still belong in measured recipes, not in your water bottle.
How It Stacks Up Against Other Herbal Waters
| Herbal Water | Strongest Claim with Real Support | Where Lemongrass Stands |
|---|---|---|
| Cucumber water | Hydration and mild antioxidant intake | Lemongrass offers more flavor complexity and digestive comfort |
| Ginger water | Nausea relief and anti-inflammatory effect | Lemongrass is gentler on the stomach and caffeine-free, but weaker on inflammation |
| Hibiscus water | Modest blood pressure reduction in human trials | Lemongrass has weaker cardiovascular data but a more neutral flavor |
| Chia water | Hydration with added fiber and omega-3s | Lemongrass is lower calorie and easier to drink daily |
The smartest way to use it is as a flavorful, low-calorie swap for sugary drinks, with a short personal checklist: start with one cup, track how you feel, avoid concentrated extracts, and stop at the first sign of any side effect. That habit captures the real upside, a pleasant daily ritual with gentle wellness payoffs, without pretending it is a treatment.
Bottom Line
it is a tasty, caffeine-free drink with a thin layer of science behind it, and the smart approach is to enjoy it for what it actually is. Stick to one or two home-steeped cups a day, keep your doctor in the loop if you take prescription medication, and let the digestive comfort and hydration do the work, while you skip the detox and weight-loss promises that the research simply does not support.
FAQ
What are the benefits of drinking lemongrass water?
The most reliable payoff is digestive comfort, especially after heavy meals, along with gentle hydration and a modest antioxidant lift. Anti-inflammatory, blood sugar, and cholesterol effects show up in lab and animal research, but a single cup does not deliver the doses those studies used. Treat the realistic benefits as pleasant rather than powerful.
Are there any side effects of lemongrass water?
Mild side effects include dizziness, dry mouth, stomach upset, and increased urination, usually tied to large amounts on an empty stomach. People with grass or Poaceae allergies may react to the plant, and handling fresh stalks can trigger contact dermatitis. Pregnant women and anyone with kidney or liver conditions should keep intake low or avoid it without medical guidance.
Is it safe to drink lemongrass water every day?
For most healthy adults, one to two cups a day of a standard-strength infusion is generally well tolerated. Daily drinking is not a good idea if you are pregnant, on diuretics, on diabetes or blood pressure medication, or taking lithium or blood thinners, because the diuretic and citral effects can stack with those drugs. Check with your prescribing clinician if any of those apply.
How much lemongrass water should you drink a day?
A practical range for a healthy adult is one to two cups of home-steeped it, using about one stalk or one tablespoon of dried herb per two cups of water. First-time drinkers should start with a single small cup and pay attention to how your body responds before making it a daily habit.
Who should not drink lemongrass water?
Pregnant or breastfeeding women, people with grass or Poaceae allergies, anyone on prescription diuretics, ACE inhibitors, diabetes medication, lithium, or blood thinners, and people with active kidney or liver disease should avoid it or clear it with a physician first. Children and infants should also steer clear, since safe pediatric dosing has not been established.
Does lemongrass water help with weight loss?
There is no direct human evidence that it itself burns fat or speeds weight loss. Any slimming effect is indirect, coming from replacing sugary drinks, staying hydrated, and the mild diuretic bump. Use it as a low-calorie swap rather than a fat-loss tool.
