Yastimadhu (Glycyrrhiza glabra): Gastric Soothing, Adrenal-Axis Support, and Safe Dosage Limits

My grandfather kept a piece of mulethi in his shirt pocket at all times. Whenever his throat felt scratchy or his stomach burned after a heavy meal, he would chew it slowly, extracting the sweet juice. As children, we loved stealing pieces from his pocket because it tasted like natural candy. “This root has more sweetness than sugar,” he would say, “but the sweetness that heals rather than harms.”

Yashtimadhu, also written Yastimadhu, is the Ayurvedic name for licorice root, commonly called mulethi in Hindi. The Ayurvedic Pharmacopoeia of India identifies Yashti as the dried, unpeeled stolon and root of Glycyrrhiza glabra. Ayurveda values it as a sweet, cooling, nourishing, and Vata-Pitta-pacifying herb, especially for the throat, respiratory tract, gastric burning, weakness, and tissue repair. Its sweetness comes largely from glycyrrhizin, a compound that also explains why licorice must be used with respect: excess or prolonged intake can raise blood pressure, lower potassium, and cause fluid retention in susceptible people.

Ayurvedic Profile and Pharmacology

Classically, Yashtimadhu is a madhura, snigdha, guru, sheeta herb with madhura vipaka. This means it is sweet in taste, unctuous and heavy in quality, cooling in potency, and nourishing after digestion. Under the synonym Madhuka, the Charaka Samhita places it in several therapeutic groups, including Jivaniya, Sandhaniya, Varnya, Kanthya, Snehopaga, Dahaprashamana, Angamardaprashamana, and Shonitasthapana. The Ayurvedic Pharmacopoeia lists its actions as Balya, Cakshushya, Vrishya, Varnya, Vatapittajit, and Raktaprasadana.

Therapeutic Application 1: Gastric Burning, Dyspepsia, and Ulcer-Conscious Support

Yashtimadhu is especially suited to burning, sourness, irritation, and dryness in the upper digestive tract. Its madhura rasa, snigdha guna, and sheeta virya make it a natural Ayurvedic choice for Pitta-type gastric discomfort and Vata-related roughness of the mucosa. In modern herbal practice, licorice root is also used for digestive burning and dyspepsia, while deglycyrrhizinated licorice is used as a demulcent preparation for minor inflammation and burning of the gastrointestinal tract.

• Classical root powder: 2–4 g of Yashtimadhu churna may be used in appropriate cases, preferably under the guidance of a qualified practitioner.
• Digestive tea or decoction: A conservative adult preparation is 1.5–2 g of cut or powdered licorice root in about 150 ml water, taken after meals when suitable.
• DGL tablets: Deglycyrrhizinated licorice is usually taken as a chewable product so it mixes with saliva before reaching the stomach. A common adult range is 380–760 mg before meals or between meals, within the product label and practitioner guidance.
• When ulcers are suspected: Persistent burning, severe abdominal pain, black stools, vomiting blood, unexplained weight loss, anemia, or chronic painkiller use requires medical evaluation. Yashtimadhu can be supportive, but it should not replace diagnosis and appropriate care for peptic ulcer disease.

Therapeutic Application 2: Adrenal-Axis Support and Cortisol Metabolism

Yashtimadhu is sometimes discussed in relation to adrenal recovery because glycyrrhizin is metabolized into compounds that affect cortisol metabolism. The key point is not that licorice forces the adrenal glands to produce more hormones; rather, glycyrrhetinic acid can inhibit 11-beta-hydroxysteroid dehydrogenase, an enzyme involved in converting cortisol to cortisone. This can make cortisol activity last longer in certain tissues, which is why the herb may feel strengthening in selected depletion patterns and why it can also cause mineralocorticoid-like side effects when misused.

In Ayurvedic terms, Yashtimadhu belongs more naturally to presentations of dryness, irritation, hoarseness, weakness, Vata-Pitta depletion, and tissue exhaustion than to heaviness, congestion, edema, or Kapha accumulation. Anyone with diagnosed adrenal disease, unexplained chronic fatigue, faintness, blood-pressure instability, or corticosteroid use should treat this as a practitioner-guided herb rather than a self-prescribed tonic.

Practical use: For ordinary root powder, stay within the 2–4 g classical dose range unless supervised. Avoid combining licorice capsules, licorice tea, mulethi sticks, black licorice candy, and formulas containing Yashtimadhu on the same day, because total glycyrrhizin exposure is what drives many safety concerns.

Therapeutic Application 3: Respiratory and Voice Support

Yashtimadhu is one of Ayurveda’s most beloved herbs for the throat and voice. The Ayurvedic Pharmacopoeia lists Kasa and Svarabheda among its uses, and Charaka’s Kanthya grouping supports its traditional reputation for the throat. Its sweet, cooling, unctuous nature makes it especially fitting for dry cough, throat scratchiness, hoarseness, and vocal strain.

• Dry cough and throat irritation: Yashtimadhu churna may be used within the 2–4 g range with a suitable anupana chosen for the person and season.
• Cough associated with cold: A simple tea can be prepared from about 1.5 g licorice root in 150 ml water, used for short-term respiratory support in appropriate adults.
• Voice strain: Slowly sipping warm Yashtimadhu tea or using a small piece of mulethi root traditionally supports the throat when dryness and roughness are the main features.
• When to seek care: Shortness of breath, fever, thick purulent sputum, chest pain, wheezing, or a cough that persists beyond a short acute episode should be assessed by a healthcare provider.

The Safety Question: Glycyrrhizin, Blood Pressure, and Potassium

This is where Yashtimadhu’s sweetness becomes a double-edged sword. Glycyrrhizin and its metabolites can inhibit 11-beta-hydroxysteroid dehydrogenase in a way that allows cortisol to act more strongly at mineralocorticoid-sensitive receptors. The result can be sodium and water retention, potassium loss, swelling, high blood pressure, muscle weakness, heart-rhythm disturbance, and, in severe cases, serious cardiovascular complications.

Who Should Avoid Yashtimadhu or Use It Only Under Direct Supervision

Glycyrrhizin-containing licorice is not appropriate for everyone. People with blood-pressure, kidney, liver, heart, electrolyte, pregnancy, or medication-related risks should not treat it as a casual home remedy.

• People with hypertension, including those whose blood pressure is controlled with medication
• People with kidney disease, liver disease, heart disease, heart failure, edema, or rhythm disorders
• Anyone with low potassium or a history of electrolyte imbalance
• People taking diuretics, cardiac glycosides, corticosteroids, stimulant laxatives, or medicines that disturb electrolytes
• People taking antihypertensive medication, because licorice may oppose blood-pressure control
• Pregnant or breastfeeding women, unless specifically guided by a qualified clinician
• Children and adolescents unless guided by a qualified practitioner
• Anyone who develops swelling, headache, muscle weakness, palpitations, or unusual fatigue while using licorice

Safer Options When Glycyrrhizin Is a Concern

When the goal is digestive demulcent support rather than the full systemic action of licorice, DGL is often the safer licorice-based option. It is processed so the finished product contains only a small percentage of the original glycyrrhizic acid, while retaining a soothing role for the gastrointestinal tract.

• DGL: Best suited when the main concern is gastric burning or minor gastrointestinal irritation and blood-pressure safety is important.
• Individualized Ayurvedic substitutes: When licorice is unsuitable, a practitioner may choose other cooling, demulcent, or nourishing herbs based on the person’s dosha pattern, digestion, medications, and diagnosis.
• Medical treatment when required: Red-flag digestive or respiratory symptoms should be evaluated rather than masked with herbs.

My Approach to Safe Use

Yashtimadhu is powerful precisely because it is both soothing and systemically active. My grandfather’s small mulethi stick, used occasionally in the context of a traditional diet and active life, is very different from concentrated capsules taken daily alongside blood-pressure medicines or a low-potassium diet.

1. Confirm whether the product is whole licorice, extract, DGL, candy, tea, or part of a formula.
2. Check blood pressure and review kidney, heart, liver, pregnancy, and medication history before regular use.
3. Keep ordinary root powder within the 2–4 g classical range unless supervised.
4. Avoid stacking multiple sources of licorice on the same day.
5. Use DGL rather than whole licorice when long-term gastric demulcent support is needed and glycyrrhizin is a concern.
6. Stop use and seek medical advice if swelling, headache, palpitations, muscle weakness, or unusual fatigue appears.
7. Reassess persistent digestive symptoms, cough, hoarseness, or fatigue instead of extending licorice use indefinitely.

For broader support around exhaustion and digestive repair, Yashtimadhu belongs inside a complete plan that considers sleep, food timing, agni, bowel habits, stress load, medications, and the person’s constitution. Used wisely, it remains one of Ayurveda’s most graceful sweet roots; used carelessly, that same sweetness can become a source of avoidable harm.

Medical Disclaimer: This article is for educational purposes only and does not constitute medical advice. Yashtimadhu or licorice can interact with medications and may cause hypertension, hypokalemia, edema, and heart-rhythm problems in susceptible people. Consult a qualified Ayurvedic practitioner or healthcare provider before using licorice products, especially if you have high blood pressure, heart disease, kidney disease, liver disease, pregnancy, electrolyte imbalance, or take prescription medicines. Do not exceed recommended dosages or use continuously without professional supervision.

References

1. Ayurvedic Pharmacopoeia of India
2. Charaka Samhita — Shadvirechanashatashritiya Adhyaya
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6. Anti-Helicobacter pylori flavonoids from licorice extract (2002), PubMed
7. Aqueous extracts and polysaccharides from liquorice roots (Glycyrrhiza glabra L.) inhibit adhesion of Helicobacter pylori to human gastric mucosa (2009), PubMed
8. Ema (ema.europa.eu)
9. NCCIH