Licorice root is a powerful natural remedy that has been used in East Asian medicine for over 5,000 years. Modern scientific research has demonstrated that glycyrrhizin, a compound found in licorice, exhibits anti-inflammatory and antioxidant properties, providing various health benefits including improved digestive health, hormonal balance, and skin brightening. In this article, we will examine in detail the specific benefits of licorice discovered in traditional and modern medicine, as well as safe methods of use.

Benefits Identified in Chinese Traditional Medicine

In Chinese medicine, licorice root (Glycyrrhiza glabra) is called "the herb that promotes the harmonious use of all medicines" and is included in nearly all herbal formulas. The classical Chinese medical text "Shennong Bencao Jing" records that licorice supplements the middle qi (中氣), detoxifies the toxicity of all medicines, and eliminates the poison of seventy different herbs.

According to traditional Chinese medicine theory, licorice strengthens the spleen and stomach to improve digestive function. In particular, it is effective at alleviating abdominal bloating, indigestion, and diarrhea symptoms. Additionally, licorice has been used to promote the circulation of qi (氣) and blood (血), thereby alleviating irregular menstruation and menstrual pain. According to clinical observations conducted by several Chinese medical institutions, approximately 60-70% of women who took herbal formulas containing licorice reported improvements in menstruation-related symptoms.

Improving stress and fatigue is also an important traditional use of licorice. Licorice is known to calm the nervous system and replenish body energy depleted by prolonged stress, and yoga and meditation practitioners have also utilized licorice as a supplementary treatment.

Benefits Identified in Western Medical Research

Over the past 20 years, Western scientific research on licorice has increased rapidly. According to a study published in the Journal of Medicinal Food in 2019, glycyrrhizin, a compound in licorice root extract, possesses powerful antioxidant capacity, eliminating reactive oxygen species (ROS) to prevent cellular damage. This study confirmed that the antioxidant index of licorice extract is comparable to that of vitamin C.

Regarding digestive health, a meta-analysis from the 2015 Phytotherapy Research journal confirmed that licorice suppresses excess gastric acid secretion and protects the stomach lining. After taking licorice extract for 8 weeks, participants in the clinical trial experienced an average 45% reduction in acid reflux symptoms and a 53% improvement in digestive discomfort.

In terms of blood sugar management, research conducted in 2017 suggested that the flavonoid compounds in licorice can mitigate blood sugar elevation and improve insulin sensitivity. However, this field still requires more large-scale clinical trials. Additionally, licorice is known to play a role in hormonal balance regulation, supporting women's estrogen metabolism and potentially alleviating hormone-related discomfort.

Radiant and Healthy Skin

Licorice's skin-brightening benefits have gained attention in both Eastern and Western beauty industries. The glabridin compound contained in licorice reduces the activity of alpha-melanocyte stimulating hormone (α-MSH), which inhibits melanin production. In a 12-week clinical trial conducted by a Japanese cosmetics company, participants using licorice extract experienced an average 8-12% brightening of their skin tone, with significant reduction in age spots and freckles.

The anti-inflammatory compounds in licorice are also effective at alleviating acne and rosacea symptoms. According to dermatological research published in 2016, patients with mild acne who used a cream containing licorice extract for four weeks experienced a 35% reduction in acne lesions. Licoricidin, a compound in licorice, inhibits the growth of bacteria that cause acne while protecting beneficial bacteria on the skin.

Skin hydration and improved elasticity are also major benefits of licorice. Licorice strengthens the skin barrier function to prevent moisture loss and promotes collagen production to improve skin elasticity. For this reason, licorice extract is included as a key ingredient in many premium skincare products.

Other Benefits of Licorice Root

Licorice's benefits for respiratory health have also been extensively researched. Licorice dilates the airways in the lungs and regulates excess mucus secretion to alleviate cough and sore throat. According to research from Chinese medical institutions, patients with cough who took herbal formulas containing licorice had their recovery period shortened by 3-5 days compared to conventional medications.

In terms of stress management, licorice is an adaptogenic plant that supports adrenal function. Prolonged stress increases cortisol and adrenaline secretion, exhausting the body. Certain compounds in licorice regulate stress hormone secretion from the adrenal glands, enhancing the body's resilience to prolonged stress. Some yoga experts recommend licorice tea as a supplementary beverage during deep relaxation practice.

Immune system enhancement is another important role of licorice. The polysaccharides and flavonoids contained in licorice enhance white blood cell activity and promote lymphocyte production, aiding in the activation of natural killer (NK) cells to improve overall immune function. Additionally, the abundant potassium content in licorice supports muscle function, nerve signal transmission, and heart health.

Drug Interactions

Before using licorice as a health supplement, you must consider potential drug interactions. Licorice can enhance or reduce the effects of certain medications. If taking blood pressure medications (ACE inhibitors, diuretics, etc.), caution is needed as licorice may further lower blood pressure.

A particular point to note is that the glycyrrhizin compound in licorice can increase potassium excretion and increase sodium retention. Therefore, patients taking diuretics or those with a tendency toward hypokalemia should consult with a doctor before taking licorice. Additionally, licorice can interact with hormone medications (particularly female hormone preparations), so women undergoing hormone replacement therapy must consult with a healthcare professional.

For patients with diabetes, licorice may affect blood sugar control, so blood sugar levels should be regularly monitored under a doctor's guidance. People with a history of heart or kidney disease are also advised to consult with a healthcare professional before taking licorice supplements.

Precautions

Licorice is generally safe when used for short-term periods (4-12 weeks). However, long-term overuse can result in several side effects. The most common side effect is high blood pressure. This occurs because glycyrrhizin in licorice activates mineralocorticoid receptors, increasing sodium retention and promoting potassium excretion.

Long-term consumption (six weeks or longer) of more than 50mg of glycyrrhizin daily can result in high blood pressure, hypokalemia, muscle weakness, and headaches. In some cases, severe hypokalemia has been reported to cause muscle paralysis and cardiac arrhythmia. Therefore, patients with high blood pressure or heart disease, pregnant women, and nursing mothers should avoid using licorice supplements.

The recommended safe dosage is 1-2g of dried licorice root daily or extract with no more than 20mg of glycyrrhizin content. For children, the standard dosage should be half that of adults, and must be done under professional medical guidance. Whether consuming licorice tea, tincture, capsules, or any other form, it is important to verify accurate content information and follow the manufacturer's instructions.

Summary

Licorice root is a powerful natural remedy where 5,000 years of traditional medicine experience meets recent scientific evidence. Its main benefits include improved digestive function, antioxidant and anti-inflammatory action, skin brightening, hormonal balance regulation, stress management, and blood sugar management support.

However, for safe use of licorice, several important points should be remembered:

  • Appropriate dosage: 1-2g of dried licorice root daily or no more than 20mg of glycyrrhizin
  • Duration of use: Short-term use of 4-12 weeks is safer than long-term use
  • Drug interactions: Check for possible interactions with blood pressure medications, diuretics, hormone preparations, etc.
  • Contraindications: Mandatory doctor consultation for patients with high blood pressure, heart disease, pregnant women, and those with hypokalemia
  • Monitoring: Regular checks of blood pressure, blood sugar, and potassium levels during long-term use

To maximize the various health benefits of licorice while considering your individual health status and current medications, consulting with a healthcare professional before use is the safest and most effective approach. Natural remedies are not always safe just because they are natural, so informed and careful decision-making is necessary.