Licorice Root
Specifically for Hives
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Why it works for Hives:
Anti-inflammatory activity. Licorice constituents (glycyrrhizin/glycyrrhetinic acid; flavonoids like licochalcone A) down-regulate inflammatory mediators (e.g., COX/LOX products, PGE2/LTB4/TXB2) and show anti-irritant effects on skin in human studies. ScienceDirect
Mast-cell / “antihistamine-adjacent” effects (preclinical). Glycyrrhizin binds and inhibits HMGB1, a pro-inflammatory alarmin; in mouse mast-cell models, glycyrrhizin suppressed HMGB1-induced mast-cell activation (a process central to hives). These are lab and animal data, not definitive human urticaria data. Cell
Clinical signal in related allergic conditions. A licorice-extract nasal irrigation improved allergic rhinitis symptoms in a clinical study program (with in-vitro and in-vivo support), suggesting anti-allergic effects that could be relevant to urticaria biology, although it’s not the same disease. lausr.org
How to use for Hives:
- Oral powder (Ayurvedic open-label trial in urticaria): licorice root powder (“Yashtimadhu churna”) 3 g twice daily after meals for 30 days. This was a single-arm (no placebo) study; see “Evidence” section for caveats. jchr.org
- Topical anti-irritant (not hives-specific): creams/lotions containing licochalcone A reduced post-shaving irritation and UV-induced erythema in randomized, vehicle-controlled human studies; products are typically applied twice daily to affected skin. (These trials assess irritation/erythema, not urticaria.) SpringerLink
- Nasal irrigation for allergic rhinitis (not hives): licorice-extract saline irrigations were studied clinically; protocols varied by the investigators’ prepared extract—this is not a standard OTC recipe. lausr.org
Because oral licorice can raise blood pressure and lower potassium (see “Warnings”), many clinicians, if considering licorice at all, prefer short courses, lowest effective doses, or using topical formulas. The NCCIH notes there are no standard oral doses for licorice; discuss with your clinician, especially if you take other medicines. NCCIH
Scientific Evidence for Hives:
Urticaria (open-label, single arm): 120 patients with urticaria took 3 g licorice powder twice daily for 30 days; authors reported ~70–85% mean reductions in itching, wheals, redness, and burning, with no reported adverse events. Important limitations: no control group, older data collection (2012–2013), single center. Consider this preliminary/low-certainty evidence. jchr.org
Dermatology anti-irritant (human RCTs, not urticaria): licochalcone A creams reduced experimentally induced erythema/irritation vs. vehicle in randomized trials—evidence that licorice flavonoids can calm inflamed skin, but not proof for hives. SpringerLink
Allergic conditions (clinical): licorice-extract nasal irrigation showed benefit in allergic rhinitis in a clinic setting alongside mechanistic studies; again, this does not establish efficacy for hives. lausr.org
Mechanistic/preclinical: HMGB1 binding/inhibition by glycyrrhizin (multiple studies), and suppression of mast-cell activation in vitro/in vivo models. Mechanistic support ≠ clinical proof. Cell
Specific Warnings for Hives:
Licorice (via glycyrrhizin → glycyrrhetinic acid) can inhibit 11β-HSD2, causing pseudo-hyperaldosteronism (sodium retention, hypertension, hypokalaemia), sometimes severe. Many case reports and reviews document this; risks rise with higher dose, longer duration, and in older adults. Deglycyrrhizinated licorice (DGL) removes most glycyrrhizin but hasn’t been studied for hives. Frontiers
Avoid or use only with medical supervision if you:
- Have hypertension, heart disease, kidney disease, or edema; are pregnant/breastfeeding; or have electrolyte disorders. (Official safety monograph.) NCCIH
- Take diuretics, digoxin, corticosteroids, fludrocortisone, or other drugs that affect potassium or blood pressure—serious interactions can occur. (Regulator safety advisory + toxicity reviews.) Medsafe
- Have had prior licorice toxicity (documented cases range from severe hypertension to arrhythmias and, rarely, respiratory complications). casereports.bmj.com
General safety guidance
- If using any oral licorice product, limit duration and dose, monitor blood pressure and potassium, and stop at any sign of swelling, weakness, palpitations, or headache. (NCCIH + narrative review.) NCCIH
- Choose reputable products; supplements aren’t tightly regulated, and doses of glycyrrhizin vary widely. (NCCIH.) NCCIH
General Information (All Ailments)
What It Is
Licorice root comes from the Glycyrrhiza glabra plant, native to parts of Europe and Asia. It has been used for thousands of years in traditional medicine systems such as Traditional Chinese Medicine (TCM), Ayurveda, and ancient Greek and Egyptian healing. The root contains several bioactive compounds, most notably glycyrrhizin, which gives it both its characteristic sweet flavor and many of its pharmacological properties.
Licorice root can be consumed in various forms—such as teas, extracts, capsules, or tinctures—and is often found in herbal blends designed for digestive health, respiratory support, or adrenal balance.
How It Works
The key active compound, glycyrrhizin, has anti-inflammatory, antiviral, and antioxidant effects. It influences several physiological systems in the body:
- Endocrine and Adrenal Support: Glycyrrhizin inhibits the enzyme 11β-hydroxysteroid dehydrogenase, which breaks down cortisol. By slowing cortisol metabolism, licorice root can enhance and prolong the effects of this hormone, potentially helping with adrenal fatigue or chronic stress.
- Anti-inflammatory and Immune Effects: The compound modulates immune responses and suppresses pro-inflammatory cytokines. It can support conditions involving inflammation of the respiratory or digestive tract, such as sore throats, coughs, or gastritis.
- Antiviral and Antimicrobial Properties: Research has shown licorice extract may inhibit the replication of certain viruses, including hepatitis C and herpes simplex virus. Its saponins and flavonoids contribute to this protective effect.
- Digestive Protection: Deglycyrrhizinated licorice (DGL) is a modified form where glycyrrhizin has been removed to reduce side effects. DGL supports mucous membrane healing, making it popular for soothing stomach ulcers, heartburn, or gastritis.
Why It’s Important
Licorice root holds importance as both a therapeutic and preventive botanical:
- Adaptogenic-Like Benefits: It helps the body adapt to stress by supporting cortisol levels, improving energy, and reducing fatigue.
- Respiratory Health: Traditionally used as an expectorant and demulcent, it soothes sore throats, eases coughs, and reduces irritation in the bronchial passages.
- Digestive Wellness: It aids in the protection and repair of gastrointestinal tissues, which can benefit those with acid reflux or ulcers.
- Liver and Skin Health: Licorice root’s antioxidant and detoxifying properties may support liver function and help manage skin conditions like eczema or acne.
Its broad range of uses makes it a cornerstone herb in both traditional and modern herbal medicine.
Considerations
Despite its benefits, licorice root must be used carefully due to its potency:
- Glycyrrhizin-Related Side Effects: Excessive intake of glycyrrhizin can lead to a condition called pseudoaldosteronism, characterized by sodium retention, potassium loss, high blood pressure, and swelling (edema).
- Deglycyrrhizinated Licorice (DGL) as a Safer Option: DGL provides many of the digestive benefits without affecting mineral balance or blood pressure, making it preferable for long-term use.
- Interactions and Contraindications: Licorice root can interact with diuretics, corticosteroids, antihypertensive drugs, and certain heart medications. It is not recommended for individuals with high blood pressure, kidney disease, or heart conditions unless supervised by a healthcare provider.
- Duration of Use: Continuous use of glycyrrhizin-containing licorice for more than a few weeks is generally discouraged without medical guidance.
- Pregnancy and Hormonal Effects: Licorice may affect hormone levels and is generally advised against during pregnancy due to potential risks to fetal development.
Helps with these conditions
Licorice Root is most effective for general wellness support with emerging research . The effectiveness varies by condition based on clinical evidence and user experiences.
Detailed Information by Condition
Acid Reflux (GERD)
Mucosal-protective effect. Licorice contains flavonoids and other compounds that appear to stimulate mucus production and strengthen the protective mu...
Constipation
Stimulates gut motility and mucus secretion. Licorice root contains glycyrrhizin and several flavonoids that appear to increase intestinal secretion a...
Stomach Ulcers
Licorice root, particularly in its deglycyrrhizinated form (DGL), has been utilized in traditional medicine for centuries to address digestive issues,...
Asthma
Anti-inflammatory & immunomodulatory actions. Key licorice constituents (e.g., glycyrrhizin/glycyrrhizic acid and flavonoids like liquiritigenin/i...
Eczema
Anti-inflammatory action. The main actives (glycyrrhizin → glycyrrhetinic acid; plus flavonoids like licochalcone A) reduce inflammatory signaling and...
Tooth Decay
Targets cariogenic bacteria and virulence. Licorice flavonoids such as licoricidin and glabridin inhibit S. mutans growth, biofilm formation, acid pro...
Rosacea
Anti-inflammatory + barrier-calming effects (esp. licochalcone A). In keratinocyte models and small clinical programs, licochalcone A down-regulates p...
H. Pylori Infection
Licorice root contains active compounds, particularly flavonoids and glycyrrhizin, that have demonstrated anti-bacterial effects against H. pylori bac...
Gastritis
Stimulates protective mucus / mucosal defence. DGL appears to increase gastric mucus and bicarbonate secretion and promote mucosal blood flow and cell...
Hepatitis
Antiviral & immunomodulatory actions (primarily in vitro/experimental): Glycyrrhizin can inhibit hepatitis C virus (HCV) replication in cell syste...
Temporomandibular Joint Disorder
Licorice contains bioactive compounds (notably glycyrrhizin and 18β-glycyrrhetinic acid, plus flavonoids like liquiritigenin/isoliquiritigenin) with w...
Bronchitis
Expectorant & antitussive actions (traditional + preclinical): European regulators list licorice root as a traditional herbal expectorant for “col...
Hives
Anti-inflammatory activity. Licorice constituents (glycyrrhizin/glycyrrhetinic acid; flavonoids like licochalcone A) down-regulate inflammatory mediat...
Ovarian Cysts
Mechanistic ideas (theories):Licorice contains glycyrrhizin/glycyrrhetinic acid, flavonoids (e.g., isoliquiritigenin, glabridin) and other compounds t...
Adrenal Insufficiency
The active licorice constituents (glycyrrhizin → glycyrrhetinic acid) inhibit the enzyme 11β-hydroxysteroid dehydrogenase type 2 (11β-HSD2). That enzy...
Laryngitis
Soothing (demulcent) + expectorant effects. Traditional pharmacopeias classify licorice as an expectorant for upper-respiratory catarrh/cough, which i...
Whooping Cough
Licorice root (Glycyrrhiza spp.) can help relieve cough symptoms because it contains demulcent/expectoral and anti-inflammatory compounds (notably gly...
Colic
Antispasmodic activity (theory): Several licorice constituents (e.g., isoliquiritigenin, licochalcone A) relax gastrointestinal smooth muscle in lab a...
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