# Varahikanda

> Varahikanda (Dioscorea bulbifera) is a plant used in Ayurveda. However, it is a critical precursor for pharmaceutical steroid synthesis. Bioavailability is significantly enhanced (3-5 fold) by lipid-based delivery systems (SEDDS, nanoemulsions) or phospholipid complexation.

## Key facts

- **Botanical name:** Dioscorea bulbifera

## Names and identification

| Language | Name |
|----------|------|
| English | Varahikanda |

## Ayurvedic pharmacology (Dravyaguna)

| Property | Value | Description |
|----------|-------|-------------|
| **Rasa** (Taste) | Madhura | Primary taste |
| **Guna** (Quality) | Guru, Snigdha | Physical quality |
| **Virya** (Potency) | Ushna | Heating/Cooling effect |
| **Vipaka** (Post-digestive) | Madhura | Post-digestive effect |

## Dosage forms and preparation

**Dosage Forms:** Churna (powder), Kwatha (decoction), Capsule, Tablet, Avaleha (confection), Modaka

**Standard Dosage:** 3-6 g powder twice daily with milk or ghee; 50-100 mL decoction twice daily

**Bioavailability:** [Diosgenin](/glossary/compounds-d-g/#diosgenin) (steroidal sapogenin) has low oral bioavailability (~10-15%) due to poor aqueous solubility and extensive hepatic metabolism. However, it is a critical precursor for pharmaceutical steroid synthesis. Bioavailability is significantly enhanced (3-5 fold) by lipid-based delivery systems (SEDDS, nanoemulsions) or phospholipid complexation. [Dioscin](/glossary/compounds-d-g/#dioscin) (glycosylated form) is hydrolyzed by gut bacteria to diosgenin, providing delayed absorption.

**Optimal Timing:** After meals with warm milk or ghee for [Rasayana](/reference/rasayana/) (rejuvenative) effect; morning and evening dosing

**Standardized Extract:** Hydroethanolic extract standardized to >10% total [saponins](/reference/saponins/) (as diosgenin equivalent by HPLC after acid hydrolysis); processed (Shodhit) tuber powder with documented detoxification protocol

**Shelf Life:** Processed powder: 18-24 months; Capsules/Tablets: 24-36 months; Avaleha: 18-24 months

**Storage:** Airtight, moisture-proof containers at 15-25 deg C. Protect from insects (starchy material attracts pests). Unprocessed tubers must be clearly labeled 'NOT FOR DIRECT CONSUMPTION - REQUIRES SHODHANA'.

**Marker Compounds:** Diosgenin, Dioscin, Dioscorine (toxic - must be absent/below limit after Shodhana), beta-[Sitosterol](/glossary/compounds-q-t/#sitosterol), [Stigmasterol](/reference/stigmasterol/), [Kaempferol](/reference/kaempferol/), [Quercetin](/reference/quercetinquercetin/)

### Extraction Methods

- Hydroethanolic extraction (60-80% ethanol)
- Acid hydrolysis of saponins to release sapogenins
- Supercritical CO2 extraction
- Soxhlet extraction with methanol
- Enzymatic hydrolysis for diosgenin release

### Synergistic Combinations

- [Ashwagandha](/herb/ashwagandha/) - [adaptogenic](/reference/adaptogenic/) and anabolic synergy
- [Shatavari](/herb/shatavari/) - female reproductive tonic combination
- Musali (Chlorophytum borivilianum) - vitality and vigor combination
- [Ghrita](/herb/ghrita/) (ghee) - lipid vehicle enhances diosgenin absorption

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

## 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.