Last verified: April 2026
Licorice — Yashtimadhu — Yashtimadhu
Yashtimadhu means 'sweet stick' — the root, when chewed, releases a sweetness estimated at 50 times more intense than sucrose. The classical texts document this not as a flavouring property but as a pharmacological indicator: the extreme sweetness signals the highest Earth + Water elemental composition, the most nourishing Guna profile, the most effective Pitta-reducing action, and the most appropriate herb for the mucous membranes of the throat, respiratory, and digestive systems.
Charaka Samhita calls Yashtimadhu the foremost herb among those that sweeten the voice — Kanthashodhaka. In the classical system, the voice is the direct expression of Prana Vata and Udana Vata — the two Vata subtypes governing breath, speech, and the movement of vital force through the chest and throat. An herb that clears, sweetens, and strengthens the voice is doing so by acting on these Vata subtypes and on the Pitta that creates inflammatory conditions in the throat and respiratory mucosa.
This is also why Yashtimadhu is documented across such a wide range of conditions — not because it is a broad-spectrum herb in the general sense, but because the throat and respiratory mucosa are affected by almost every systemic condition, and Yashtimadhu's specific action on these channels makes it relevant across respiratory, digestive, reproductive, and neurological applications. Every classical prescription for vocal clarity, dry cough, acid reflux (Amlapitta), peptic conditions (Shotha of the stomach), and oral health uses Yashtimadhu as either a primary or synergistic herb.
The Medhya (cognitive) classification alongside Brahmi and Shankhpushpi is based on the classical theory that the brain and nervous system are sustained by Majja Dhatu, which is itself nourished by the unctuous, cold, sweet qualities that Yashtimadhu possesses in the highest concentration of any common herb. The classical texts document it specifically for conditions involving Sadhaka Pitta — the subtype of Pitta that governs the heart and the quality of mind.
Classical pharmacological profile
Rasa: Madhura (sweet) dominant with Tikta (bitter) secondary. The extreme sweetness — the highest of any herb in the classical materia medica — signals the Earth + Water elemental dominance that characterises the most nourishing, unctuous, and tissue-building herbs.
Guna: Guru (heavy) and Snigdha (unctuous). The heavy, oily quality is the basis for its mucosal coating action — the classical texts document it as coating and protecting the mucous membranes of the throat, digestive, and respiratory system.
Virya: Sheeta (cold). The cold potency combined with sweet taste makes Yashtimadhu the most effective Pitta-reducing herb for inflammatory mucosal conditions — peptic ulcers, acid reflux, dry inflamed throat, and respiratory inflammation.
Ayurvedic Pharmacopoeia of India monograph
API Volume I, Part I, Monograph No. 1.1.30 specifies: dried root and rhizome of Glycyrrhiza glabra L., Family Fabaceae; glycyrrhizin content (by HPLC): not less than 4%; total ash: not more than 8%; alcohol-soluble extractive: not less than 20%; water-soluble extractive: not less than 25%. TLC identity uses glycyrrhizin and liquiritigenin as reference standards. Note: G. uralensis Fisch. (Chinese licorice) and G. inflata Bat. are documented as acceptable substitutes in Chinese medicine but are distinct from the API specification for Yashtimadhu.