Java Tea (Orthosiphon).
Southeast Asian herb for kidney and urinary health Gentle diuretic supporting kidney function and fluid balance. Traditional use for urinary tract health.
Reviewed March 2026
- Category
- Herb
- Also filed under
- Kidney StonesDiureticUTI
What Java Tea (Orthosiphon) is, and what it does.
- Does it work
- Traditional use well documented. Modern research limited but supportive of diuretic effects.
- How much to take
- Start with 500 to 1,000mg of leaf extract a day, or the dried leaf brewed as a tea. That band is where the leaf supports normal urine flow.
- Time to feel it
- Two to four hours for the extra trips to the bathroom. Anything to do with steady fluid balance settles over several days of daily use.
- The first dose
- You will likely pass more urine within a few hours, and the extra volume is mostly water rather than a big electrolyte loss. Keep drinking to thirst.
- With regular use
- Diuretic effect within 2-4 hours. Sustained benefits over weeks.
- How well tolerated
- May affect electrolyte balance with chronic use. Stay hydrated. Not for kidney disease.
- How it feels
- Increased urination within a few hours. Reduced bloating and puffiness over days.
- The overlooked benefit
- The dried leaf is unusually potassium-rich, which is part of why the traditional preparation is a water infusion rather than a concentrated capsule.
500 to 1,000mg a day is where Java Tea (Orthosiphon) works.
Source: J Ethnopharmacol. 2012;141(3):853-864. Orthosiphon stamineus review.
The proof, claim by claim.
These words describe the research, not the molecule's worth. Research strength is how much work stands behind one claim, and it is never a product score.
Java Tea (Orthosiphon) has emerging evidence. Based on 23+ studies.
- urine volume and normal urinary flowAnimal study
- urinary tract comfortNarrative review
- uric acid already in the normal rangeAnimal study
- antioxidant activity of leaf flavonesIn vitro study
- healthy glucose metabolismAnimal study
Questions people ask about Java Tea (Orthosiphon).
- When should I take it?
- Timing matters less than consistency. Pick a time that works for you and take it daily.
- Can I take it with other supplements?
- Usually fine. The main thing to watch is not doubling up on the same ingredient from different products. If you're on prescription meds, check with your pharmacist first.
- Any side effects to watch for?
- Most people tolerate it well at recommended doses. GI upset is the most common complaint with any supplement. Start with a lower dose and work up. If something feels off, stop and reassess.
- Who benefits most from this?
- People who've already covered the basics (diet, sleep, exercise) and want to fine-tune. It's not essential, but could be worthwhile for the right person.
Why these belong in the same formula. Each row says what the basis is, from settled biochemistry through to a trial that measured the pair.
Orthosiphon raises urine volume through an aquaretic action while arbutin from uva ursi is carried into the urine as its active metabolite. Higher flow moves that metabolite through the tract.
Cranberry proanthocyanidins interfere with bacterial fimbriae attaching to the bladder lining, and the higher urine flow from orthosiphon helps carry unattached organisms out.
D-mannose is excreted largely unchanged and occupies bacterial type 1 fimbriae in the urine, while the added flow from orthosiphon shortens how long anything stays in place.
Nettle leaf also raises urine output without acting on the loop transporters. Both work by increasing renal water handling rather than by forcing sodium loss.
Sustained higher urine flow raises how much potassium leaves in the urine. Formulas that push water excretion pair with potassium so blood levels stay in the normal range.
Magnesium is reabsorbed in the loop and distal tubule, and a sustained rise in urine flow increases what is lost. Replacement keeps normal status while the aquaretic is in use.
Citrate binds urinary calcium and raises urine pH, which keeps calcium salts in solution, while the higher flow from orthosiphon lowers the concentration of everything dissolved.
Dandelion leaf raises urine output and is itself high in potassium, which offsets some of the potassium carried out when urine volume rises.
Glycyrrhizin inhibits 11-beta-hydroxysteroid dehydrogenase type 2 in the kidney, which promotes sodium retention and potassium loss. Orthosiphon leaf is used traditionally for the opposite reason, to increase urine flow. Pairing them puts two opposing influences on renal electrolyte handling in the same formula, and the licorice effect is the better characterised of the two. This is a flag, not a benefit.
Caffeine antagonises adenosine A1 receptors in the proximal tubule and reduces sodium reabsorption, which raises urine output. Orthosiphon leaf is traditionally used as an aquaretic. Two influences on urine volume in one product can add up, so fluid intake matters more, not less.
Any sustained increase in urine flow carries sodium, potassium and chloride out with the water. Replacing those alongside is standard practice in hydration formulas built around aquaretic herbs. The relationship is compensatory rather than synergistic in effect.
Ascorbic acid is excreted in urine and modestly lowers urinary pH at higher intakes. Orthosiphon is used for flow rather than pH, so the two act on different properties of the same fluid. Products that pair them are usually aiming at urinary tract comfort formulas; the combination itself has not been measured.
Marshmallow root supplies mucilage polysaccharides used for mucosal soothing, while Orthosiphon leaf is used for urine flow. They appear together in traditional European and Southeast Asian urinary preparations. The pairing rests on tradition and monograph description, not on trial data.
Rosmarinic acid is a principal phenolic in Orthosiphon leaf and is named for its abundance in rosemary. Formulas containing both raise total rosmarinic acid exposure from two sources. That is an additive constituent load rather than a demonstrated combined effect.
Green tea contributes both caffeine and catechin polyphenols, so it brings a mild diuretic influence and a second phenolic load to a formula already carrying Orthosiphon phenolics. The overlap is in class rather than in a specific molecule. Nothing has been measured for the combination.
Urinary calcium excretion tracks sodium excretion in the proximal tubule, so anything that raises urine flow and sodium loss tends to move calcium as well. Orthosiphon is used traditionally for exactly that flow effect. The direction is predictable from renal physiology; the magnitude for this herb has not been quantified.
Ginger is a common companion in the same regional herbal traditions that use Orthosiphon leaf tea, usually for palatability and digestive comfort. There is no pharmacological interaction described between them. Read it as formulation and tradition rather than mechanism.
Nothing specific on file for Java Tea (Orthosiphon). Match the label to the daily amount above, and tell your doctor what you take.
Not medical advice. Show the label to your pharmacist.What Java Tea (Orthosiphon) actually does.
Orthosiphon stamineus leaf carries rosmarinic acid, caffeic acid derivatives and the lipophilic methoxylated flavones sinensetin, eupatorin and 3-hydroxy-5,6,7,4-tetramethoxyflavone, which are the constituents used as extract markers.
Sinensetin and the other methoxylated flavones are lipophilic and poorly water-soluble, so a hot water infusion and a hydroethanolic extract of the same leaf do not deliver the same constituent profile.
Rosmarinic acid is hydrolysed and extensively conjugated after oral intake, appearing in circulation largely as sulfate and glucuronide metabolites of caffeic and ferulic acid rather than as the parent compound.
The dried leaf is a notably potassium-rich botanical, which is part of why traditional preparations are taken as a water infusion rather than a concentrated extract.
Where Java Tea (Orthosiphon) comes from.
It is a leaf. Growers dry it, and it is either packed as tea or soaked in hot water or alcohol, filtered and dried into a powder for capsules. The solvent used decides which of the leaf compounds actually make it into the finished product.
Made from a plant. What ends up in the capsule tracks the harvest, so batch testing and a stated marker matter more here than with a made molecule.
Aerial parts, principally leaf and young stem, harvested from cultivated or wild-collected plants in Southeast Asia, where the species is native
Shade or low-temperature air drying preserves the phenolic content; high-heat drying degrades rosmarinic acid and darkens the material
Hot water pulls the phenolic acids and minerals and matches the traditional infusion; ethanol and water mixtures additionally bring across the lipophilic methoxyflavones
The extract is filtered to remove plant solids, then concentrated under vacuum before drying
Extracts intended for capsules are assayed by HPLC against sinensetin or total phenolics and adjusted with carrier to a declared figure; loose leaf is sold on identity and quality testing instead
Either packed as cut and sifted leaf for infusion, or spray-dried onto a carrier such as maltodextrin for encapsulation
Getting Java Tea (Orthosiphon) from food.
The whole-food sources on file. A supplement closes the gap, it does not replace dinner.
A gram-for-gram figure (how much of each you would eat to match a dose) will appear here once it is sourced and reviewed. This page will not print a number it cannot cite.
The forms it comes in.
The essence, in one line each.
- A review of Orthosiphon stamineus catalogues its main constituents, including rosmarinic acid and sinensetin, and reports diuretic and antioxidant activity drawn largely from laboratory and animal work rather than controlled human trials.Systematic review. Ashraf et al., 2018 (Journal of pharmacy & bioallied sciences). PMID 30237681 ↗
- Orthosiphon is named among the plants recorded in this ethnobotanical and pharmacological survey for traditional use relating to blood pressure, and the authors describe the supporting pharmacology as largely preclinical.Narrative review. Muhaimin M et al., 2026 (Drug Design, Development and Therapy). PMID 42163992 ↗
- Laboratory analysis of commercial medicinal plant materials found macro- and microelement contents varying widely between products, which the authors framed as a case for routine elemental monitoring of botanical raw material.In vitro study. de Souza ID et al., 2021 (BioMed Research International). PMID 33869633 ↗
These are the studies our verdict leans on, chosen from the 12 we read for Java Tea (Orthosiphon). The full linked list is below.
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement regimen.