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Licorice Herb – Our Sweet Tonic


Scientific Name: Glycyrrhiza glabra, G. uralensis
Family: Pea (Fabacaea)
Taste: Sweet
Plant Properties: demulcent, antiviral, pectoral, anti-tussive, anti-inflammatory, laxative, immunomodulator, immunostimulant, hepatoprotective
Used for: coughs, viral infections, eczema, constipation, inflamed mucus membranes, heartburn, ulcers, stress, fatigue, sore throat, “peacemaker” in formulas, hepatitis, asthma
Plant Preparations: pastille, tea, syrup, tincture, candy, capsules, toothbrush
Licorice is one of the most-used herbs in Traditional Chinese Medicine. It is frequently used in small amounts in formulas and is considered to be a synergist or peacemaker in that it helps herbs work together more effectively.
Licorice has a strong sweet taste (50 times sweeter than sugar) and shines as a demulcent herb, but licorice has numerous powerful uses that go beyond being a simple demulcent.

In ancient China, licorice was considered a principle drug among all drugs. It is perhaps the most commonly used herb in classical prescriptions. [The Shennong Herbal] states that licorice is used to balance the five viscera (organs) and six bowels. It also reports that licorice strengthens the sinews and bones, enhances muscle growth and strength, and is used topically to heal wounds. 

Winston and Maimes
Soothing Inflammation (Demulcent) 
Licorice is a sweet demulcent that soothes mucous membranes.
If you only ever used licorice for its demulcent qualities you would still find an amazing array of uses for it.
When I have a scratchy sore throat licorice root teas are the first thing I reach for. The sweet taste and thick consistency of licorice seem to magically erase dry and irritated sore throats. When I have a cold I’ll even keep licorice tea in a thermos on my bed stand to easily reach when I wake up dry and parched.
Besides soothing sore throats, licorice is famously used as a pectoral herb. It soothes coughs, especially those dry and irritating coughs that can keep you up all night. Since sore throats and coughs tend to come together this is a wonderful herb to reach for. Add to that its antiviral and antibacterial properties and you’ve got one heck of a useful herb for common upper respiratory infections. It has been used against both pneumonia and tuberculosis.
Licorice can also soothe mucous membranes further down the line. It is commonly used for all types of ulcers and other types of inflammation in the digestive tract. I commonly use it for people who have irritated bowels such as those diagnosed with IBS.
Licorice has been shown to be effective against Heliobacter pylori. This means it can not only soothe digestive ulcers but can also be effective against the bacteria that often causes these internal wounds.
It can be specific for people who have constipation with dry and hard stools. The demulcent qualities of the root can soothe the irritated tissues and it is also gently stool loosening.

Liquorice root is emollient, demulcent, and nutritive. It acts upon mucous surfaces, lessening irritation, and is consequently useful in coughs, catarrhs, irritation of the urinary organs, and pain of the intestines in diarrhoea. 

King’s American Dispensatory
Glycyrrhiza uralensis
Antiviral and Antibacterial
Licorice is a multifaceted antiviral herb that is used for a variety of viruses, including hepatitis, herpes, pneumonia and the common rhino virus (colds).
Licorice can be taken internally for viral infections and used externally on viral sores such as herpes lesions. Besides inhibiting viral replication, licorice also can stimulate the immune system response to more effectively kill viruses.
When using licorice for its antiviral properties the whole root must be used, not DGL products.
Licorice is also mildly antibacterial. It has been shown to be effective against helicobacter pylori and various bacteria commonly found in the mouth.

Licorice is broadly antiviral. It is active against a wide range of viruses through multiple mechanisms. It strongly inhibits the ability of many viruses to create the membrane pores through which the viruses then enter cells. This slows or even ends the viral infection right there. For other viruses, it is directly virucidal, and for others it stimulates the host immune system specifically to attack the invading virus. 

Steven Buhner
Herbal Antivirals
Licorice has adaptogen qualities and is specific for people with adrenal insufficiency and low cortisol levels. It spares cortisol by inhibiting its conversion to cortisone. It is commonly used in adaptogen formulas.

As an adaptogen, licorice benefits the HPA axis function and the sympathoadrenal system (SAS). I frequently use it for people with adrenal insufficiency who have symptoms of fatigue, tiredness upon waking up in the morning, elevated cortisol and blood sugar levels, and frequent colds. 

Winston and Maimes
Botanically speaking… 
Licorice is a part of the pea family (Fabaceae).
Its leaves are the classic pinnately divided leaves of the pea family. They are 3-6 inches long and have 9-17 leaflets.
Its flowers have a classic pea flower shape and are blue to purple in color.
We use the roots primarily for medicine (I hear the leaves can be used too but I’ve never used them myself). The roots are ideally harvested when the plant is at least three years old.
Plant Preparations… 
Licorice can be used in a variety of ways. It is important to note that it is most often used in combination with other herbs and probably should not be used in large dosages for long periods of time (see the special considerations section for more information).
Tincture: Steven Buhner recommends 1:5 at 50%.
Tea: Decoction of the roots or the powder mixed with water.
Pastilles: Commonly mixed with slippery elm to make sore throat lozenges.
Capsules: Works fine as a capsule.
DGL Tablets: This is a processed product that has the glycyrrhizin removed. It is commonly used for ulcers (see special considerations for more information).
Peacemaker: Many classical Chinese formulas contain small amounts (5%-10%) of licorice. The theory is that licorice increases the effectiveness of other herbs and gets them to “play together nicely,” thus being a peacemaker of herbs.
Toothbrush: Licorice is a wonderful herb for healthy gums. See the HerbMentor resources section for an article on how to use the whole root as a toothbrush.
Most of the licorice produced today is used as a tobacco flavoring agent.

Licorice is used in Ayurveda to improve eyesight, strength, sexual potency and libido. Licorice is considered, as adaptogens generally do, to enhance the effects of other herbs in a formula,so it is widely used.

-KP Khalsa
Culinary Herbalism Course
Special Considerations… 
Licorice has gotten some bad press. Like any herbal special consideration it is best to know the details rather than label an herb as being bad or good or claiming that it always does such and such.
Licorice, especially when taken in large amounts for long periods of time, can increase blood pressure and cause water retention. Some people seem to be more susceptible to this than others.
To avoid this, here are some suggestions.
Take licorice in smaller dosages and as part of a larger herbal formula.
Avoid taking more than 10 grams of licorice per day for an extended period of time.
If you decide to take larger dosages of licorice, have your blood pressure checked regularly and discontinue use if you notice any unusual water retention in your body.
Avoid use of licorice if you currently have high blood pressure and/or edema.
Licorice may also interact with corticosteroid medications by increasing their effect. If you are on corticosteroid medication then it would be best to work with someone experienced in using these two substances together.
Interestingly, many of the case studies involving unwanted effects of licorice happened in people consuming large amounts of licorice candy.
Licorice root is not recommended during pregnancy and its safety has not been established for lactation.
Licorice is probably one of the most-used herbs of all time. Interesting that this designation goes to an herb that is so incredibly sweet! It can be used for a wide range of benefits, from addressing acute situations like a cold or flu to addressing chronic infections and inflammatory states. As long as you take care in using licorice it is a powerful medicinal ally.
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HerbMentor Resources… 
Wintertime Formulas Featuring Licorice
Cited Resources
AHPA Botanical Safety Handbook, Second Edition
AHG Symposium 2012 Class Notes, Jillian Bar-av
King’s American Dispensatory
Adaptogens by Winston and Maimes
Herbal Antivirals by Steven Harrod Buhner


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