# Kembuka

> Kembuka (Costus speciosus) is a plant used in Ayurveda. Traditional preparation with Trikatu enhances absorption of lipophilic constituents. Decoction form provides hydrolyzed glycosides with improved absorption. Mucilaginous constituents slow but sustain absorption.

## Key facts

- **Botanical name:** Costus speciosus

## Names and identification

| Language | Name |
|----------|------|
| English | Kembuka |

## Ayurvedic pharmacology (Dravyaguna)

| Property | Value | Description |
|----------|-------|-------------|
| **Rasa** (Taste) | Tikta, Kashaya | Primary taste |
| **Guna** (Quality) | Laghu, Ruksha | Physical quality |
| **Virya** (Potency) | Sheeta | Heating/Cooling effect |
| **Vipaka** (Post-digestive) | Katu | Post-digestive effect |

## Dosage forms and preparation

**Dosage Forms:** Churna (powder), Kashayam (decoction), Kalka (paste), Capsule, Phanta (hot infusion)

**Standard Dosage:** 2-4 g powder twice daily; 40-80 mL decoction twice daily; paste for external application as needed

**Bioavailability:** [Alkaloids](/glossary/compounds-1-a/#alkaloids) and flavonoid [glycosides](/glossary/compounds-g-l/#glycosides) show moderate oral bioavailability. Traditional preparation with [Trikatu](/herb/trikatu/) enhances absorption of lipophilic constituents. Decoction form provides hydrolyzed glycosides with improved absorption. Mucilaginous constituents slow but sustain absorption.

**Optimal Timing:** After meals with warm water; for anti-inflammatory applications, twice daily at consistent intervals

**Standardized Extract:** Standardized to minimum 2% [diosgenin](/glossary/compounds-d-g/#diosgenin) by HPLC and 3% total [saponins](/reference/saponins/) (as diosgenin equivalents)

**Shelf Life:** 18 months for rhizome powder; 24 months for capsules; decoction consumed within 24 hours

**Storage:** Store dried rhizome material in airtight containers at 15-30°C. High moisture content of raw rhizome (>70%) demands thorough drying to <10% moisture. Protect from humidity and insect infestation.

**Marker Compounds:** Diosgenin, [Costunolide](/glossary/compounds-c-d/#costunolide), Eremanthin, [Stigmasterol](/reference/stigmasterol/), Beta-[sitosterol](/glossary/compounds-q-t/#sitosterol), Gracillin, Prosapogenin

### Extraction Methods

- Water decoction (traditional)
- Hydroalcoholic extraction (50-60% ethanol)
- Cold maceration for [mucilage](/glossary/compounds-l-o/#mucilage)-rich preparations
- Infusion for volatile-rich fractions

### Synergistic Combinations

- Shunthi ([Ginger](/herb/ginger/)) for digestive and carminative synergy
- [Haridra](/herb/haridra/) for anti-inflammatory combinations
- Musta for digestive disorders
- [Eranda](/herb/eranda/) for anti-arthritic formulations

---

Canonical version of this page: https://nighantu.ageayurveda.com/herb/kembuka/

## Sources

- Amidha Ayurveda Herb Database (700+ herbs, CC-BY-4.0)
- Ayurvedic Pharmacopoeia of India

Published by Age Ayurveda in the Nighantu. Educational reference only, not medical advice.
Incorporates material from the Amidha Ayurveda Herb Database under CC BY 4.0.