Glycyrrhiza uralensis root
Also known as: Licorice root, Chinese licorice, Glycyrrhiza glabra, Glycyrrhiza uralensis
Overview
Glycyrrhiza uralensis root, commonly known as Chinese licorice, is a traditional herbal medicine widely utilized in East Asia. Its therapeutic properties stem primarily from bioactive compounds like glycyrrhizin and glycyrrhetinic acid. This herb is traditionally employed for a range of conditions including liver diseases, gastrointestinal disorders, and various skin conditions, and is recognized for its potent anti-inflammatory, antioxidative, anti-allergenic, and antimicrobial effects. Research on Glycyrrhiza uralensis, and its closely related species Glycyrrhiza glabra, is extensive, with numerous clinical trials and systematic reviews supporting its efficacy. While generally considered safe at moderate doses, its use requires careful consideration due to potential mineralocorticoid-like side effects, particularly with chronic or high-dose consumption.
Benefits
Glycyrrhiza uralensis offers several evidence-based benefits. It demonstrates significant anti-inflammatory and hepatoprotective effects, reducing inflammation and oxidative stress in liver diseases, as supported by meta-analyses. For weight management, a meta-analysis of 26 clinical trials indicated that licorice consumption led to statistically significant reductions in body weight. In skin health, topical applications of licorice root extracts are used to mitigate signs of photoaging and improve skin condition, potentially by inhibiting 11β-HSD1 in adipose tissue. Furthermore, licorice has shown promise in alleviating gastrointestinal toxicity, including chemo-induced side effects. While preliminary, some research suggests anti-acetylcholinesterase activity, hinting at potential cognitive benefits. Benefits are particularly noted in individuals with metabolic syndrome, liver disease, and skin aging concerns. The strength of evidence is high for weight reduction and liver protection, with effects potentially observable within weeks.
How it works
The primary mechanism of action for Glycyrrhiza uralensis involves its active metabolite, glycyrrhetinic acid. This compound inhibits the enzyme 11β-hydroxysteroid dehydrogenase type 2 (11β-HSD2), leading to increased local concentrations of cortisol and subsequent mineralocorticoid receptor activation. This activation can result in sodium retention, potassium loss, and elevated blood pressure. Glycyrrhizin, the precursor, is converted to glycyrrhetinic acid by intestinal microflora, which is crucial for its bioactivity. Additionally, licorice exerts anti-inflammatory effects through antioxidative pathways and modulation of immune responses. It can also interact with cytochrome P450 enzymes (CYP3A, CYP2D6) and P-glycoprotein, influencing the metabolism and transport of various drugs.
Side effects
While generally safe at moderate doses, Glycyrrhiza uralensis can cause mineralocorticoid-like side effects, especially with chronic or high-dose use. Common side effects (occurring in >5% of users) include mild edema, hypertension (high blood pressure), and hypokalemia (low potassium levels). Uncommon side effects (1-5%) may involve cardiovascular adverse events in sensitive individuals, particularly those with pre-existing hypertension or on certain medications. Rare but severe side effects (<1%) include severe hypertension and hypokalemia leading to muscle weakness or arrhythmias. Licorice has several significant drug interactions: it may reduce the efficacy of metformin, interfere with antihypertensive drugs, and interact with MAO inhibitors, P-glycoprotein substrates (e.g., daunorubicin), and CYP450 substrates. It has also been reported to reduce INR in patients on phenprocoumon, increasing stroke risk. Contraindications include patients with hypertension, hypokalemia, heart failure, or those on medications affected by mineralocorticoid activity. Elderly individuals, those with cardiovascular disease, or those on oral contraceptives are at increased risk.
Dosage
The minimum effective dose of Glycyrrhiza uralensis varies by preparation, but clinical studies often use standardized glycyrrhizin doses ranging from 100 to 400 mg per day. The optimal dosage typically falls within 100–380 mg of glycyrrhizin daily in clinical trials. The maximum safe dose for chronic intake is generally considered to be below 400 mg of glycyrrhizin per day, as exceeding this amount is associated with an increased risk of adverse mineralocorticoid effects. Effects on blood pressure and electrolytes can manifest within one week of high-dose consumption. Licorice is available in various forms, including oral extracts, topical creams, and intravenous preparations, with specific recommendations depending on the indication. Its bioactivation relies on conversion by intestinal microflora. While no specific cofactors are required, monitoring of electrolytes is advised during its use.
FAQs
Is licorice root safe for long-term use?
Prolonged use of licorice root can lead to hypertension and hypokalemia; therefore, regular monitoring of blood pressure and potassium levels is necessary.
Can licorice root interact with medications?
Yes, licorice root can interact with several medications, including antihypertensives, anticoagulants, and drugs metabolized by CYP enzymes, potentially altering their effects.
How soon do benefits appear?
Some benefits, such as weight loss or improvements in skin condition, may become noticeable within a few weeks of consistent use.
Does licorice root cause high blood pressure?
Yes, licorice root can cause high blood pressure due to its mineralocorticoid-like effects, especially when consumed at higher doses or for prolonged periods.
Research Sources
- https://www.alzdiscovery.org/uploads/cognitive_vitality_media/Licorice-Root-Cognitive-Vitality-For-Researchers.pdf – This review summarizes clinical data on licorice, highlighting its inhibition of 11β-HSD1/2, its role in reducing fat thickness, and improving skin aging. It notes that mild adverse effects are reversible, but cautions about cardiovascular risk in sensitive individuals, integrating both clinical and mechanistic insights.
- https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2021.752926/pdf – This systematic review primarily focuses on preclinical animal studies, identifying licorice as a key component in polyherbal combinations for metabolic syndrome treatment. While systematic, its findings are largely based on preclinical data, with limited human RCT evidence.
- https://www.liebertpub.com/doi/full/10.1089/jmf.2019.4459?doi=10.1089%2Fjmf.2019.4459 – This meta-analysis of 26 randomized controlled trials demonstrates that licorice consumption significantly reduces body weight and exhibits anti-inflammatory and hepatoprotective effects. It acknowledges heterogeneity in formulations and some small sample sizes but provides a high-quality systematic review with statistical synthesis.
- https://onlinelibrary.wiley.com/doi/10.1002/ptr.8288 – This systematic review and meta-analysis of randomized controlled trials indicates that licorice formulations are effective in improving liver disease and metabolic parameters. It highlights the variability in licorice preparations and doses across studies but maintains a rigorous methodological approach.
- https://www.mskcc.org/cancer-care/integrative-medicine/herbs/licorice – This source provides information on licorice, including its potential to alleviate gastrointestinal toxicity, such as chemo-induced side effects. It also details potential drug interactions, including those with metformin, antihypertensive drugs, and various enzyme substrates.
Supplements Containing Glycyrrhiza uralensis root
Gan Cao Alcohol Free
Hawaii Pharm
Gan Cao
Hawaii Pharm
Fu Zi Li Zhong Wan
Min Shan
Gui Pi Wan
Min Shan
Xiang Sha Yang Wei Wan
Min Shan
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Lilium Teapills
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Nourish The Surface Teapills
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