Agarkasth (Sanskrit: अगरकाष्ठ, also Aguru), botanically Aquilaria malaccensis Lam. (syn. Aquilaria agallocha), belonging to the family Thymelaeaceae, is native to Northeast India, Bangladesh, and Southeast Asia. This prized heartwood — formed when the tree produces resinous agarwood (oud) in response to fungal infection — is among the most valuable plant substances in the world. Ayurveda uses it for calming the nervous system, supporting digestion, cardiac health, and skin care. Modern research confirms its sedative, antimicrobial, and antioxidant properties.
Ayurvedic Properties of Agarkasth
| Property | Value |
|---|---|
| Sanskrit Name | Aguru, Agarkasth, Krimi-aguru, Vishvabheshaja |
| Other Names | Agarwood, Oud, Eaglewood, Aloeswood, Agar (Hindi), Chen Xiang (Chinese) |
| Botanical Name | Aquilaria malaccensis Lam. (syn. A. agallocha Roxb.) |
| Plant Family | Thymelaeaceae |
| Part Used | Heartwood (resin-impregnated), essential oil |
| Rasa (Taste) | Tikta (bitter), Katu (pungent) |
| Guna (Quality) | Laghu (light), Snigdha (unctuous), Tikshna (sharp) |
| Virya (Potency) | Ushna (hot) |
| Vipaka | Katu (pungent post-digestive effect) |
| Doshic Action | Vata-Kapha shamaka; pacifies Vata and Kapha while mildly aggravating Pitta in excess |
| Primary Action | Hridya (cardiotonic), Medhya (nootropic), Deepana (digestive stimulant), Balya (strengthening), Mutrajanana (diuretic), Vedanasthapana (analgesic) |
Health Benefits of Agarkasth
Calms the Nervous System and Mind
Agarkasth is classified as Medhya (mind-nourishing) and is one of Ayurveda’s premier substances for calming an agitated Vata-driven nervous system. Its warm, deeply grounding aroma and bioactive sesquiterpenes act on the limbic system, reducing anxiety, stress, and promoting mental clarity. The essential oil has demonstrated sedative properties in multiple animal studies, reducing locomotor activity and increasing sleep duration. Traditional Ayurvedic incense burning of Agaru was a deliberate therapeutic practice for creating healing environments. (Natural Product Communications, 2012)
Heart and Circulatory Health
Classified as Hridya (beneficial for the heart) in classical texts, Agarkasth supports cardiac function and circulatory wellness. Its bitter compounds have mild cardioprotective effects, reducing oxidative stress on cardiac tissue. In Ayurvedic practice, Aguru is included in formulations for Hridroga (heart conditions), where it is believed to strengthen the heart muscle, reduce palpitations, and calm Vata-driven cardiac irregularities. Research confirms agarwood extracts possess antiarrhythmic properties. (Journal of Natural Medicines, 2015)
Digestive Stimulant and Carminative
Agarkasth’s Deepana (digestive fire stimulant) properties address Kapha-type digestive sluggishness, bloating, and lack of appetite. Its warming (Ushna) virya and bitter-pungent taste stimulate gastric enzyme secretion and improve peristalsis. The essential oil demonstrates significant antispasmodic effects, relieving abdominal cramping and intestinal gas. In classical Ayurvedic practice, small amounts of Aguru are included in digestive compounds for their warming, aromatic, and carminative properties.
Antimicrobial and Anti-inflammatory Properties
Agarwood extracts demonstrate broad-spectrum antimicrobial activity against bacteria, fungi, and viruses, supporting its traditional use in fever and infection. Sesquiterpenes including agarol, agarospirol, and jinkohol inhibit growth of Staphylococcus aureus, E. coli, and various fungi. Anti-inflammatory activity is mediated through inhibition of NF-κB signaling and reduction of pro-inflammatory cytokines, supporting its use in joint pain and inflammatory skin conditions. (Molecules, 2016)
Skin Health and Cosmetic Uses
Agarkasth is a prized ingredient in Ayurvedic skin care, particularly for its antimicrobial, anti-inflammatory, and aromatic properties. Topical application of agarwood paste or oil addresses skin infections, itching, and inflammatory skin conditions. Its use as a cosmetic body paste in traditional Indian weddings and ceremonies reflects its deep cultural recognition as a skin-beautifying and purifying substance. Modern cosmetic formulations use agarwood oil for its luxurious, long-lasting fragrance and skin-toning effects.
Diuretic and Urinary Health Support
Agarkasth’s Mutrajanana (diuretic) property supports kidney function and urinary health. Classical Ayurvedic texts prescribe Aguru in formulations for Mutrakriccha (painful urination) and to reduce fluid retention. Its anti-inflammatory and antimicrobial properties provide additional benefit in urinary tract infections. The diuretic action helps flush toxins (Ama) from the body, supporting overall detoxification.
Respiratory Support
The warming, expectorant properties of Agarkasth make it useful for Kapha-type respiratory conditions including chronic cough, asthma, and bronchial congestion. Inhalation of agarwood smoke or essential oil was a classical Ayurvedic practice for respiratory ailments, a tradition shared across Ayurveda, Unani, and Chinese medicine. The antimicrobial properties also help address respiratory infections contributing to chronic cough.
How to Use Agarkasth
| Form | Preparation | Dosage | Best Time |
|---|---|---|---|
| Powder (Churna) | Finely powdered heartwood | 0.5–1 g with honey or warm water | Twice daily after meals |
| Decoction (Kashaya) | Boil 2–5 g heartwood in 200 ml water; reduce to half | 50 ml twice daily | Morning and evening |
| Essential oil (topical) | Dilute 2–3 drops in 10 ml carrier oil (sesame or coconut) | Apply to affected area | As needed for pain or skin |
| Incense/fumigation | Burn small piece of agarwood | Aromatic therapy | Evening for calming mind |
Side Effects and Precautions
Known Contraindications
- High Pitta conditions — its heating (Ushna) virya may aggravate Pitta in excess; use with cooling anupana
- Pregnancy — use only under qualified medical supervision due to uterine-stimulating properties in large doses
- Acute inflammatory conditions with excess heat
Drug Interactions
- Sedative medications — may have additive CNS-depressant effects
- Antihypertensive drugs — mild vasodilatory effects may potentiate blood pressure lowering
Who Should Avoid
- Pregnant women without medical supervision
- Individuals with severe Pitta disorders or active inflammatory conditions
- Children under 5 years without specialist guidance
Safe Dosage Range
The internal therapeutic dose of Agarkasth powder is 0.5–1 g per day, typically with honey or warm milk. Decoctions: 50 ml twice daily. The essential oil is used topically in diluted form (1–2% in carrier oil) or aromatically. Due to the rarity and value of true agarwood, quality sourcing is critical. Always consult a qualified Ayurvedic practitioner before use.
Classical Text References
Charaka Samhita (Chikitsa Sthana 9) mentions Aguru in formulations for Hridroga (heart disease) and Rajayakshma (chronic wasting). Ashtanga Hridayam (Sutrasthana 15) classifies Aguru as Hridya (cardiotonic) and Medhya (nootropic), recommending it for Vata and Kapha disorders. Sushruta Samhita includes it in Eladi Gana, noting its utility in skin conditions, fevers, and respiratory disorders.
Frequently Asked Questions About Agarkasth
What is Agarkasth used for in Ayurveda?
Agarkasth (Agarwood, Aquilaria malaccensis) is used in Ayurveda for calming the nervous system, supporting heart health, stimulating digestion, treating respiratory conditions, managing skin disorders, and as a diuretic. It is one of the most prized aromatic substances in classical Ayurvedic, Unani, and Chinese medicine systems.
What are the main benefits of Agarkasth?
Key benefits include calming anxiety and the nervous system, cardiotonic effects, digestive stimulation, broad-spectrum antimicrobial activity, skin healing and beautification, respiratory support, and diuretic action. Its essential oil provides powerful aromatic therapeutic benefits.
Can Agarkasth be taken daily?
Agarkasth can be used therapeutically on a daily basis for defined treatment periods. Due to its heating potency, daily internal use for extended periods (beyond 4–6 weeks) should be under the guidance of an Ayurvedic practitioner, particularly for Pitta-dominant individuals. Aromatic use is generally safe for daily practice.
What is the correct dosage of Agarkasth?
Internal powder: 0.5–1 g daily with honey or warm water. Decoction: 50 ml twice daily. Essential oil: 2–3 drops diluted in carrier oil for topical use. Always source high-quality, authentic agarwood from ethical suppliers.
Does Agarkasth have any side effects?
In therapeutic doses, Agarkasth is generally safe. Excess intake may aggravate Pitta, causing gastric irritation or increased body heat. Pregnant women should avoid medicinal doses. It may interact with sedative and antihypertensive medications. Adulteration of agarwood products is common — always verify quality.
Which dosha does Agarkasth balance?
Agarkasth primarily balances Vata and Kapha doshas. Its warming (Ushna) quality and grounding nature calm Vata’s erratic energy, while its bitter-pungent taste and drying (Ruksha) quality reduce Kapha’s heaviness and congestion. In excess doses, its heating quality may mildly aggravate Pitta.