Licorice Root
Licorice root, sourced from the plant Glycyrrhiza glabra, is a multifaceted botanical extract recognized for its primary active compounds: triterpenoid saponins like glycyrrhizin, and various flavonoids. Biochemically, glycyrrhizin is a potent sweet compound that, upon hydrolysis, yields glycyrrhetinic acid. Its significant physiological role involves modulating corticosteroid metabolism. The principal mechanism of action attributed to glycyrrhizin is the reversible inhibition of 11β-hydroxysteroid dehydrogenase type 2 (11β-HSD2) enzyme. This inhibition reduces the conversion of active cortisol to inactive cortisone, thereby prolonging cortisol's half-life and enhancing its local effects, particularly in mineralocorticoid-sensitive tissues like the kidneys. Additionally, licorice constituents exhibit anti-inflammatory properties by modulating prostaglandin synthesis via inhibition of cyclooxygenase (COX) and lipoxygenase (LOX) pathways, alongside notable antioxidant and antiviral activities. Clinically, licorice is widely investigated for its gastroprotective effects, aiding in dyspepsia and peptic ulcers, often utilized as deglycyrrhizinated licorice (DGL) to mitigate systemic glycyrrhizin-related side effects. It also supports respiratory health, acting as a demulcent and expectorant. Ongoing research explores its hepatoprotective, neuroprotective, and adaptogenic potentials.
Navigate sections
Form & Dosage
Licorice Root Extract (Glycyrrhizin-containing)
This form contains glycyrrhizin, the primary active compound responsible for many of licorice's traditional uses, including respiratory and digestive support, as well as its adaptogenic properties. However, glycyrrhizin can cause significant side effects such as elevated blood pressure, fluid retention, and potassium depletion, especially with prolonged or high-dose use. Careful monitoring of blood pressure and potassium levels, as well as cyclical use (e.g., 4-6 weeks on, 2-4 weeks off), are often advised to mitigate risks.
Regularly monitor blood pressure and potassium levels, especially during initial use and if taking for extended periods. Discontinue immediately and consult a healthcare professional if you experience symptoms like high blood pressure, fluid retention, muscle weakness, or irregular heartbeat. Cycling the supplement (e.g., 45 days on, 21 days off) is crucial to prevent accumulation of glycyrrhizin and mitigate the risk of electrolyte imbalance and hypertension. Avoid concurrent use with diuretics, corticosteroids, or other medications that affect blood pressure or potassium levels. For optimal absorption and to minimize potential gastric upset, take with food. Choose products standardized for glycyrrhizin content to ensure consistent dosing.
Effects (12)
Wound Healing Acceleration
DGL licorice is highly effective in promoting the healing of internal wounds, particularly stomach and duodenal ulcers. It achieves this by stimulating the production of protective mucus and strengthening the integrity of the gastrointestinal lining, accelerating cellular repair without the systemic side effects of glycyrrhizin.
Respiratory System Support
Standard licorice root effectively soothes irritated respiratory passages and acts as an expectorant, helping to thin and clear mucus. This is largely due to glycyrrhizin, which provides demulcent properties and mild anti-inflammatory action, making breathing easier.
Digestion Improvement
Licorice root supports healthy digestion by acting as a demulcent, soothing irritated mucous membranes throughout the gastrointestinal tract. DGL form is particularly effective at stimulating protective mucus production in the stomach and healing ulcers, while standard licorice offers general anti-inflammatory and soothing benefits.
Oral Health Support
Standard licorice root contains compounds with antimicrobial properties that can inhibit the growth of bacteria associated with cavities and gum disease. Its use can support overall oral hygiene and contribute to healthier teeth and gums.
Immune System Support
Standard licorice root offers immune-modulating benefits, primarily due to glycyrrhizin, which can enhance various aspects of immune response, helping the body defend against pathogens. It is often used traditionally during cold and flu season to bolster natural defenses.
Stress Resilience Improvement
The glycyrrhizin in standard licorice root can inhibit the enzyme that breaks down cortisol, thereby prolonging its effects and potentially supporting adrenal function. This may enhance the body's ability to adapt to chronic stress and maintain energy levels, though individual responses vary and long-term use requires caution.
Fatigue Reduction
By supporting adrenal function and cortisol metabolism through its glycyrrhizin content, standard licorice root is often reported by users to help reduce general fatigue and improve overall vitality. This effect is more pronounced with consistent, longer-term use and can vary widely between individuals.
Inflammation Reduction
Licorice root, especially its glycyrrhizin content in the standard form, possesses potent anti-inflammatory properties by modulating various inflammatory pathways and, in some cases, prolonging cortisol's action. DGL also provides localized anti-inflammatory relief within the digestive system.
Antiviral Effect
Glycyrrhizin in standard licorice root exhibits potent antiviral properties against a range of viruses by inhibiting viral replication and adsorption to host cells. While strong in laboratory settings, its direct clinical antiviral efficacy in humans can vary, though it's a promising area of research.
Liver Health Support
Standard licorice root is traditionally recognized for its hepatoprotective properties. It may support liver health by contributing to antioxidant defense and modulating inflammatory responses, helping to protect liver cells from various stressors, though stronger evidence is needed in human clinical settings.
Analgesic Effect
Licorice root can offer mild analgesic effects, primarily by reducing inflammation. Standard licorice may soothe sore throats, while DGL is highly effective in relieving pain associated with stomach irritation and ulcers by promoting a protective gut lining.
Antioxidant Protection Enhancement
Licorice root contains various flavonoids and other compounds that exhibit antioxidant properties, helping to neutralize free radicals and protect cells from oxidative stress. While it contributes to overall antioxidant defense, it is not its most prominent effect.
Side Effects (6)
Increased Blood Pressure (Hypertension)
This side effect is a common concern with standard licorice root, as its active compound, glycyrrhizin, can lead to fluid and sodium retention, causing blood pressure to rise, especially with prolonged daily use.
Fluid Retention (Edema)
Standard licorice root, particularly with long-term use, can cause your body to retain excess sodium and water, leading to noticeable swelling, often in the ankles and hands.
Hypokalemia
Prolonged intake of standard licorice root can deplete your body's potassium stores, as glycyrrhizin promotes its excretion, potentially leading to muscle weakness or abnormal heart rhythms.
Muscle Weakness
A rare but concerning side effect, muscle weakness can manifest as a result of hypokalemia induced by long-term use of glycyrrhizin-containing licorice root.
Nausea
While DGL licorice is generally gentle on the stomach, some sensitive individuals may still experience mild nausea, especially if taken on an empty stomach or in large doses.
Abdominal Bloating
Despite its gastroprotective properties, DGL licorice may cause mild bloating or gas in a small percentage of users due to individual digestive sensitivities.
Indications
- + Gastroesophageal Reflux Disease (GERD)
- + Heartburn
- + Hyperacidity (Stomach)
- + Herpes Support
- + Liver Disease
Contraindications
- - Heart Failure
- - Heart Arrhythmia
- - Kidney Disease
- - Pregnancy
- - Breastfeeding
Synergies
Antagonists
Restrictions
- ! Not recommended for pregnant women
- ! Not recommended for breastfeeding women
- ! Not recommended for children
This chemical form is restricted for pregnant and breastfeeding women due to the risk of fetal harm, preterm birth, or transfer to infant via breast milk, potentially causing adverse effects like electrolyte imbalance and developmental issues. It is also restricted for children and elderly individuals due to increased sensitivity to its effects, higher risk of electrolyte disturbances, and potential for exacerbating pre-existing conditions like hypertension or heart disease. Individuals with high blood pressure, heart conditions, kidney disease, liver disease, or hypokalemia should strictly avoid this supplement. It interacts significantly with diuretics, corticosteroids, and blood pressure medications, leading to dangerous health complications. Discontinue use if swelling, muscle weakness, or irregular heartbeat occurs.