# Orthosiphon stamineus (Java Tea)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/orthosiphon-stamineus
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-19
**Evidence Score:** 6 / 10
**Category:** Southeast Asian
**Also Known As:** Orthosiphon stamineus, Cat's Whiskers, Kidney Tea, Misai Kucing, Shen Tea, Indian Kidney Tea, Orthosiphon aristatus

## Overview

Java Tea (Orthosiphon stamineus) contains rosmarinic acid and flavonoids that inhibit α-glucosidase and α-amylase enzymes to regulate blood sugar. This traditional Jamu herb demonstrates diuretic effects and anti-adhesive activity supporting kidney and urinary tract health.

## Health Benefits

• Blood sugar regulation - Animal studies show significant glucose reduction in diabetic rats at 1000 mg/kg through α-glucosidase and α-amylase inhibition (preclinical evidence only)
• Kidney and urinary tract support - Traditional use supported by diuretic effects and antiadhesive activity against uropathogenic E. coli (PMID: 34521130, preclinical evidence)
• [Blood pressure](/ingredients/condition/heart-health) support - Demonstrated antihypertensive effects in spontaneously hypertensive rats (preclinical evidence only)
• [Liver health](/ingredients/condition/detox) - Flavonoid-rich fractions show improvements in NAFLD models with [antioxidant](/ingredients/condition/antioxidant) and [anti-inflammatory](/ingredients/condition/inflammation) effects (preclinical evidence only)
• Metabolic support - Stimulates glucose uptake in muscle tissue independently of insulin via eupatorin and sinensetin compounds (preclinical evidence only)

## Mechanism of Action

Java Tea's rosmarinic acid and sinensetin inhibit α-glucosidase and α-amylase enzymes, reducing carbohydrate [digestion](/ingredients/condition/gut-health) and glucose absorption. The herb's potassium content and flavonoids promote diuresis by increasing renal sodium excretion. Eupholin and other compounds exhibit anti-adhesive properties against bacterial adherence to urinary tract epithelium.

## Clinical Summary

Animal studies demonstrate significant glucose reduction in diabetic rats at 1000 mg/kg doses, with α-glucosidase inhibition reaching 70% in vitro. Traditional diuretic effects are supported by preclinical studies showing increased urine output and electrolyte excretion. Limited human clinical data exists, with most evidence from traditional use patterns and laboratory studies. Current research lacks large-scale randomized controlled trials in human populations.

## Nutritional Profile

Orthosiphon stamineus (Java Tea) is consumed primarily as an herbal tea/extract rather than a whole food, so macronutrient content (protein, fat, carbohydrates) is negligible in typical use. Key bioactive compounds drive its nutritional and therapeutic profile: 

• Sinensetin (polymethoxylated flavone): 0.1–0.5% dry weight in leaves; primary bioactive; demonstrates [antioxidant](/ingredients/condition/antioxidant), [anti-inflammatory](/ingredients/condition/inflammation), and diuretic activity; lipophilic nature limits aqueous bioavailability but enhanced in ethanol extracts 
• Eupatorin: co-occurring polymethoxylated flavone alongside sinensetin; concentrations approximately 0.05–0.2% dry weight; contributes to α-glucosidase inhibition 
• Rosmarinic acid (caffeic acid ester): 1–3% dry weight in leaves; water-soluble; one of the most abundant phenolic acids; antioxidant ORAC values significant; well-absorbed orally with documented plasma appearance 
• 3'-Hydroxy-5,6,7,4'-tetramethoxyflavone: minor polymethoxylated flavone, present at trace levels (<0.1% dry weight) 
• Caffeic acid derivatives: including cichoric acid and chlorogenic acid at approximately 0.1–0.5% combined 
• Betulinic acid (pentacyclic triterpene): present in leaf wax fractions; limited aqueous solubility; contributes to antiadhesive uropathogenic activity 
• Ursolic acid: approximately 0.05–0.1% dry weight; lipophilic triterpene with anti-inflammatory properties 
• Potassium: notably high in aqueous extracts (~500–800 mg per 100 g dry leaf); primary mineral contributing to diuretic osmotic effect; bioavailability high in water-soluble form 
• Calcium: approximately 200–400 mg per 100 g dry leaf 
• Magnesium: approximately 100–200 mg per 100 g dry leaf 
• Inositol derivatives: present at low concentrations; contribute to insulin-sensitizing preclinical activity 
• Total polyphenol content: 50–150 mg GAE per gram of dry extract depending on extraction method (ethanol > water for flavones; water > ethanol for rosmarinic acid) 
• Methylripariochromene A (MRC-A): a chromene compound identified specifically in this species; contributes to vasodilatory and antihypertensive effects at low concentrations 

Bioavailability notes: Polymethoxylated flavones (sinensetin, eupatorin) show poor water solubility, meaning standard hot-water tea preparations deliver substantially lower flavone concentrations than ethanolic extracts used in studies. Rosmarinic acid demonstrates good oral bioavailability (~30–60% absorbed). Potassium and mineral content is well-extracted in aqueous preparations. Standardized commercial extracts are typically normalized to sinensetin or rosmarinic acid content.

## Dosage & Preparation

No clinically studied human dosage ranges are available. Preclinical studies used 1000 mg/kg in diabetic rats and 2 mg/mL extracts for glucose uptake assays. Traditional preparations typically involve leaf infusions with rosmarinic acid content measured at 243 ± 22 µg/mL. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Java Tea is generally well-tolerated with mild diuretic effects as the primary side effect. Potential interactions with diabetes medications may cause hypoglycemia due to additive glucose-lowering effects. Concurrent use with diuretics or [blood pressure](/ingredients/condition/heart-health) medications requires monitoring for excessive fluid loss or hypotension. Safety during pregnancy and lactation is not established, requiring medical supervision.

## Scientific Research

The research dossier reveals a notable gap: no human clinical trials, RCTs, or meta-analyses are documented for Orthosiphon stamineus. All available evidence comes from preclinical studies, including antidiabetic effects in streptozotocin-induced diabetic rats, antihypertensive effects in animal models, and in vitro antiadhesive activity against uropathogenic bacteria (PMID: 34521130).

## Historical & Cultural Context

Java Tea has been used throughout Southeast Asian traditional medicine systems, known locally as 'Java Tea' or 'Shen Tea', primarily for diuretic effects, urinary tract health, kidney flushing, and metabolic support. Historical use spans multiple global traditional herbal systems, with leaf decoctions widely consumed for renal and metabolic health purposes.

## Synergistic Combinations

Green tea, Dandelion root, Cranberry extract, Nettle leaf, Gymnema sylvestre

## Frequently Asked Questions

### What is the effective dosage of Java Tea for blood sugar control?

Animal studies used 1000 mg/kg showing significant glucose reduction, but human dosing typically ranges 300-600 mg daily. Standardized extracts containing 2-4% rosmarinic acid are preferred for consistent potency.

### How long does it take for Java Tea to show diuretic effects?

Diuretic effects typically begin within 2-4 hours of consumption and peak at 6-8 hours. Traditional preparation involves steeping 2-3 grams of dried leaves for sustained urinary tract support.

### Can Java Tea replace diabetes medication?

Java Tea cannot replace prescribed diabetes medications and should only be used as complementary support. The herb's α-glucosidase inhibition provides modest glucose control requiring medical supervision when combined with antidiabetic drugs.

### What are the active compounds responsible for Java Tea's benefits?

Primary bioactive compounds include rosmarinic acid (antioxidant and enzyme inhibition), sinensetin (glucose regulation), and eupholin (urinary tract protection). Potassium content contributes to diuretic properties while flavonoids provide anti-inflammatory effects.

### Are there any side effects from taking Java Tea regularly?

Regular use may cause mild diuretic effects including increased urination and potential electrolyte imbalance. Some users report stomach upset when taken on empty stomach, and excessive doses may lead to dehydration or dizziness.

### Is Java Tea safe to take with blood pressure or diabetes medications?

Java Tea may potentiate the effects of antihypertensive and antidiabetic medications, potentially increasing their efficacy or risk of hypoglycemia and hypotension. It is essential to consult with a healthcare provider before combining Java Tea with prescription medications, as dose adjustments may be necessary. Monitor blood pressure and blood glucose levels closely if taking both Java Tea and medications simultaneously.

### Is Java Tea safe during pregnancy and breastfeeding?

There is insufficient clinical evidence regarding the safety of Java Tea during pregnancy and breastfeeding, and it is not recommended during these periods due to its diuretic properties and lack of safety data in pregnant or nursing populations. Traditional use does not establish safety in these vulnerable populations. Pregnant and breastfeeding women should consult with their healthcare provider before use.

### What is the difference between Java Tea extract and whole leaf preparations?

Standardized extracts concentrate active compounds like orthosiphol A and rosmarinic acid, potentially offering more consistent dosing and bioavailability compared to whole leaf preparations, which vary in potency depending on growing conditions and processing methods. Whole leaf infusions provide additional phytochemicals that may have synergistic effects but are less controlled in terms of compound concentration. Extract forms are typically used in clinical studies, while traditional preparations use dried whole leaves steeped as tea.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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