About This Herb*
Traditional Chinese Medicine background and properties
Herb Description*
One of the most widely used herbs in all of Chinese medicine, licorice root supports digestion, soothes sore throats, relieves muscle cramps, and helps other herbs in a formula work together harmoniously. The ancient Chinese called it 'The Elder Statesman' (Guó Lǎo) because of its ability to mediate and balance the actions of other medicinal ingredients. It appears in more classical formulas than almost any other herb.
Herb Category*
Main Actions*
- Tonifies the Middle and Augments Qi
- Clears Heat and Resolves Toxicity
- Expels Phlegm and Stops Cough
- Relaxes Spasms and Relieves Urgency
- Harmonizes Other Herbs
How These Actions Work*
'Tonifies the Spleen and augments Qi' means Gān Cǎo strengthens the digestive system and boosts the body's vital Qi. Because it is sweet in taste and enters the Spleen and Stomach channels, it naturally supplements the middle Qi that the Spleen produces. This makes it useful for tiredness, poor appetite, loose stools, and shortness of breath that come from a weakened digestive system. In the honey-prepared form (Zhì Gān Cǎo), this tonifying action is significantly enhanced.
'Clears Heat and resolves toxins' applies specifically to the raw, unprocessed form (Shēng Gān Cǎo). Despite being neutral in temperature overall, raw licorice has a slightly cooling quality that allows it to clear Heat-toxins. This is why it is used for sore throat, skin abscesses, boils, and mouth ulcers, often paired with herbs like Jīn Yín Huā (honeysuckle) or Jú Gěng (platycodon). It also helps neutralize the toxicity of other herbs and even some ingested poisons.
'Expels Phlegm and stops cough' reflects licorice's ability to moisten the Lungs and help clear Phlegm from the airways. It enters the Lung channel and is sweet and moistening, making it suitable for coughs of almost any type, whether from cold, heat, dryness, or deficiency.
'Relaxes spasm and stops pain' (缓急止痛 huǎn jí zhǐ tòng) means the herb can relieve cramping and spasmodic pain, particularly in the abdomen and limbs. The classical example is Sháo Yào Gān Cǎo Tāng (Peony and Licorice Decoction), where licorice works with white peony to ease muscle cramps and leg spasms.
'Moderates and harmonizes other herbs' is perhaps licorice's most famous role. Its sweet, gentle nature buffers the harsh or toxic properties of other herbs in a formula, softens strong flavours, and helps different ingredients work together smoothly. This is why classical Chinese physicians nicknamed it Guó Lǎo ('The Elder Statesman') and why the saying goes 'nine out of ten prescriptions contain Gān Cǎo.'
Patterns Addressed*
In TCM, symptoms cluster into recognizable patterns of disharmony that reveal what's out of balance in the body. Gan Cao is traditionally associated with these specific patterns.
The following describes this herb's classification within Traditional Chinese Medicine theory and is provided for educational purposes only.
Why Gan Cao addresses this pattern
Gān Cǎo is sweet in taste and enters the Spleen and Stomach channels, making it a natural supplement for weakened digestive Qi. When the Spleen fails to properly transform food into Qi and Blood, symptoms like fatigue, poor appetite, and loose stools appear. Gān Cǎo's sweet, tonifying nature directly replenishes the Spleen's Qi, and its gentle quality makes it safe even for patients who are quite depleted. In this pattern, the honey-processed form (Zhì Gān Cǎo) is preferred for its stronger warming and tonifying effect.
A practitioner would look for one or more of these signs
Tiredness and lack of stamina from weakened digestive function
Reduced desire to eat
Soft or unformed bowel movements
Mild breathlessness on exertion
Why Gan Cao addresses this pattern
Raw Gān Cǎo (Shēng Gān Cǎo) can clear Heat-toxins from the body, addressing the pathogenic Heat that drives infections, abscesses, and inflammatory swellings. Although it is classified as neutral rather than cold, its detoxifying action is well-documented and enhanced when combined with strongly Heat-clearing herbs like Jīn Yín Huā and Lián Qiào. It enters the Heart channel (the Fire organ), giving it a direct pathway for clearing Heart-Fire and Fire-toxin that manifest as sore throat and mouth ulcers.
A practitioner would look for one or more of these signs
Painful, inflamed throat
Oral sores or canker sores from Heat-toxin
Boils and carbuncles from toxic Heat
Why Gan Cao addresses this pattern
When Heart Qi is insufficient, the heart cannot maintain a steady rhythm, leading to palpitations and an irregular pulse. Honey-processed Gān Cǎo (Zhì Gān Cǎo) enters the Heart channel and tonifies Heart Qi, helping restore normal cardiac rhythm. It is the key herb in the formula Zhì Gān Cǎo Tāng specifically because its sweet, warm, tonifying nature directly supplements the Heart Qi that has become too weak to maintain the pulse.
A practitioner would look for one or more of these signs
Awareness of heartbeat, especially with an irregular rhythm
Breathlessness from insufficient Heart Qi
General weakness accompanying heart symptoms
TCM Properties*
Neutral
Sweet (甘 gān)
Root (根 gēn)
This is partial information on the herb's TCM properties. More detailed information is available on the herb's dedicated page
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.