Ayurveda Codex›Formulations›Churna

Last verified: April 2026

Churna

चूर्ण — Churna — "Powder; that which is ground fine"

Churna is the most direct formulation in Ayurveda — herb in its simplest processed form, dried and ground to a fine powder. It is also the most commonly prescribed. The classical texts document Churna as acting primarily in the digestive tract and accessible channels, making it the first-choice preparation for digestive conditions and as the base material for other formulation types.

Important noticeThis page documents what classical Ayurvedic texts record about Churna preparations. This is not medical advice. Which formulation is appropriate requires assessment by a qualified practitioner (BAMS or MD Ayurveda). Full disclaimer →
Definition
Churna is one or more herbs dried below 12% moisture and ground to a fine powder of specified mesh size. Sharangadhara Samhita documents that Churna should pass through a 120-mesh sieve and be shade-dried (not sun-dried) to preserve volatile compounds.

Why powder form — the classical rationale

Sharangadhara Samhita, Madhyama Khanda 6 documents the reasoning: Churna retains the complete herb — fibre, water-soluble and fat-soluble compounds together. No extraction medium is interposed between the herb and the digestive system. The digestive fire (Agni) performs the extraction directly. This is both the strength and the limitation: Churna is the most complete form, but the most dependent on adequate Agni to process it.

The three conditions for prescribing Churna: the active principles are stable to drying and grinding; the condition is centred in the digestive tract or channels directly accessible from it; and the patient's Agni is sufficient to process a dry preparation.

Sharangadhara Samhita, Madhyama Khanda 6.4–6
"Churnam sukshma chalanam yuktam — a Churna should be fine, sifted, and appropriate. Dried in shade, ground smooth, free from insects, stored in a clean sealed container — such a Churna preserves its potency for one to two years."
1
Selection and cleaning: Herbs selected at correct harvest time per classical seasonal protocols. Foreign matter removed.
2
Shade drying: Dried in shade — not direct sunlight — to preserve volatile compounds. Moisture below 12% before grinding. Roots: 5–10 days. Leaves: 2–5 days.
3
Grinding: Ground to fine powder. Classical standard: 120-mesh sieve (Sharangadhara Samhita) — approximately 120 micron particle size. Metals and minerals excluded from Churna — they require Bhasma processing.
4
Mixing for compound Churna: Individual herb powders weighed and mixed in prescribed ratios. Most formulations specify mixing by weight.
5
Storage: Sealed containers away from sunlight and moisture. API and Schedule T GMP specify airtight containers for moisture-sensitive preparations.
Quality in the commercial market
The Ayurvedic Pharmacopoeia of India specifies quality standards for all Churna preparations: moisture, ash, extractive values, and TLC identity markers. Adulteration with cheaper herbs or starch fillers is a documented market issue. Purchase from Ministry of AYUSH-licensed manufacturers with API-compliant testing is the quality standard.

Classical prescription criteria

Indicated when: Condition centred in Annavaha Srotas (digestive channels); adequate Agni; condition not so acute that faster Kashaya is required; long-term administration where self-prepared powder is practical.

Contraindicated when: Severely impaired Agni (Manda Agni) — dry powder will not be properly processed; condition requires deep-tissue penetration (Ghrita or Taila preferred); volatile compounds require decoction extraction.

Anupana (vehicle): Determines which channel the Churna primarily acts on. Triphala Churna in warm water for laxative action; with honey for Kapha; with ghee for Vata. Ashwagandha Churna with warm milk for Rasayana. The anupana is a clinically significant prescription decision.

Typical classical dosing — Sharangadhara Samhita
Standard Churna dosing: 3–6 grams (approximately half a Karsha). Children receive proportionally reduced doses. Rule: the dose should not overwhelm the Agni of the patient — dose is adjusted based on Agni strength assessment.

Example Churna preparations

Triphala ChurnaThree-fruit compound — the most widely prescribed Churna across all three Brihat Trayi texts.
Trikatu ChurnaShunthi + Pippali + Maricha — primary Deepaniya compound. Ashtanga Hridayam, Sutrasthana.
Ashwagandha ChurnaRoot powder in milk — primary Rasayana Churna from Bhavaprakasha.
Sitopaladi ChurnaClassical respiratory compound — Sharangadhara Samhita for Kasa and Shwasa.
Hingwashtaka ChurnaAsafoetida-based compound for Vata-type digestive disorders.