15 Evidence-Based Health Benefits Of Licorice Root

Reviewed By Registered Dietitian Monica Auslander Moreno, MS, RDN
by Ravi Teja Tadimalla
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Licorice is also known as the ‘sweet root’ (as it contains a compound that makes it 50 times sweeter than sugar). This root has numerous health benefits and may assist in cancer treatment, boost brain health, and aid diabetes treatment. Licorice root also has anti-inflammatory and expectorant properties.

In this post, we discuss the many benefits of licorice root and what research states about them. Take a look.

What Are The Health Benefits Of Licorice Root?

Licorice root is primarily known for its ability to heal the gastrointestinal system. It contains glycyrrhizin (the active compound in licorice that accounts for its sweet taste), a compound known to reduce cancer risk and inflammation. The other important bioactive compounds in licorice root help boost brain function and aid diabetes treatment. The fiber in the root may aid weight loss.

Note: When we refer to licorice, we don’t mean the candy (which is a type of wax containing sugar). Real licorice root is not laden with sugar.

1. May Improve Gastrointestinal Health

Licorice root may help treat conditions like acid reflux. This could be especially true with DGL, or deglycyrrhizinated licorice (a form of licorice root, which we will discuss in a little while). DGL is known to increase mucus production, and this can protect the stomach lining from excess acid. DGL may also help ease nausea and ulcers (1).

The root can also treat heartburn and acid reflux associated with GERD (gastroesophageal reflux disease) and its other symptoms like vomiting (1).

Licorice root can also help treat gastric lesions as it is an anti-inflammatory agent (2). The root also speeds the recovery of the stomach lining. This can be attributed to the presence of glycyrrhizic acid in the root, which restores balance in the gut. The acid suppresses the growth of the H. pylori bacteria, which can cause various issues with digestion (hairstyles). 

2. May Assist Cancer Treatment

An American study states that licorice and its derivatives can offer protection against DNA damage. The polyphenols in the root also induce cancer cell death (4).

Some research states that licorice may help in maintaining the quality of life of the patients better than chemotherapy (5).

The glycyrrhizin in licorice induces cancer cell death in prostate cancer. Studies reveal its therapeutic potential against prostate cancer (6).

3. May Boost Brain Health

The glycyrrhizic acid in licorice was found to help treat neuroinflammation and cognitive impairment in mice (7). The root may also keep mental skills sharp, though more research is warranted.

Another compound in licorice, called liquiritigenin, was found to have anti-inflammatory properties. As a consequence, it may help treat the neuroinflammation associated with Alzheimer’s (8).

Some sources state that licorice might also aid depression treatment. However, more research is needed in this regard.

4. May Improve Skin Health

Licorice root has antiseptic, anti-inflammatory, and demulcent properties that help heal various skin conditions, such as redness and inflammation (9). Licorice root may also brighten your skin.

You can prepare a face mask by mixing turmeric powder and Fuller’s earth with licorice tea. Apply the pack to your face and allow it to dry. Rinse off the face pack with normal water. You can add a few drops of coconut oil, olive oil or almond oil to it to keep the skin hydrated.

As per anecdotal evidence, regular use of licorice may help fade blemishes and dark spots.

Application of cool licorice tea may help in healing a number of skin disorders. Some of them could include eczema, psoriasis, dry skin, and skin rashes.

Incorporating licorice tea in the diet may protect the skin from the harmful UV rays. A licorice root decoction may be used as a sunscreen lotion to protect the skin from sunburns and tan. To treat sun damage, you need to apply a pack prepared by mixing the crushed cucumber in licorice tea. However, none of these claimed benefits of licorice have been proven by research.

5. May Aid Diabetes Treatment

The molecules in licorice root were found to possess anti-diabetic properties in rat studies (10).

More interestingly, diabetic rats that were given licorice extract experienced a drop in their blood sugar levels. A couple of substances in licorice, namely glabridin and amorfrutin, were deemed responsible for this benefit (11).

6. May Help With Weight Loss

One study showed that the intake of 3.5 grams of licorice a day could reduce body fat by 4% (12). Licorice also contains fiber, which may help one feel full and reduce cravings.

Preliminary research also states that licorice can decrease body fat mass. The root also has desirable effects on the thickness of body fat (13).

Studies have also shown that supplementing with licorice flavonoid oil may reduce total body fat and visceral fat in overweight individuals (14). Licorice tea might also help reduce body fat, though this is yet to be substantiated by evidence.

7. May Boost Liver Health

The anti-inflammatory properties of licorice have been found to protect the liver from alcohol-induced injury. The root is also known to improve the antioxidant defense in this case (15).

Studies have also shown how licorice root can offer relief in non-alcoholic fatty liver disease. However, more studies are needed in this aspect (16). Licorice root was also found to have some therapeutic effect on other liver ailments like jaundice (17).

8. May Fight Inflammation

We are already aware of the anti-inflammatory effects of licorice root. The root is particularly effective in treating inflammation of the digestive tract. The glycyrrhizin in the root also inhibits tissue inflammation by reducing the generation of reactive oxygen species (18).

Licorice can protect against chronic inflammation and related conditions like arthritis as per mice studies (19). It also is believed that licorice acts like the body’s natural corticosteroids (compounds that reduce inflammation). However, more research is needed to understand this particular mechanism of licorice.

9. May Relieve Adrenal Fatigue And Other Hormonal Issues

Licorice may help balance hormones (20). The root has been traditionally used to balance female hormones, thus relieving the symptoms of premenstrual syndrome and menopause. The flavonoids in licorice may have a beneficial estrogenic effect on human cells (20).

Licorice root is also known to be used in herbal supplements specifically prescribed for treating polycystic ovarian syndrome or PCOS. However, we need more information in this aspect.

10. May Enhance Immunity

Licorice root has antiviral and antimicrobial properties, and these may help boost immunity. The glycyrrhizin in licorice may stimulate immunity and help fight several viral infections, as per studies conducted on ducklings (21). It also may prevent other bacterial and fungal infections.

Licorice root also plays a role in relieving cough and other ailments of the respiratory tract. It has anti-tussive and expectorant properties (22). The root may also treat cold and soothe a sore throat.

The root coats the throat with a thin film of mucus, protecting the delicate tissues in there. However, more research is needed to understand this mechanism. Crude licorice may also eliminate phlegm and aid in detoxification (23). 

11. May Improve Male Fertility

Studies have shown that licorice root may help treat erectile dysfunction. The root improves overall health on a cellular level. It also has beneficial effects on male hormonal levels (24).

However, studies are contradictory in this regard. An Italian study states that licorice may reduce serum testosterone levels in men  (25). Hence, talk to your doctor before using licorice for this purpose.

12. May Relieve Symptoms Of PMS And Menopause

It is said that licorice root may offer relief from menstrual cramps. It may moderate the spasms and alleviate pain. Some research suggests that it can also help relieve hot flashes, though more studies are needed (26). The root has an estrogen-like effect in women, and this helps relieve symptoms of PMS and menopause (27).

In one study, licorice was found to be much better than hormone replacement therapy in reducing the duration of hot flashes (28).

13. May Improve Oral Health

Research has shown that licorice root may reduce cavities and help treat other oral diseases, including caries and oral candidiasis. It also may help prevent periodontitis, a serious oral disease that destroys the gums and bones and tissues that maintain the teeth (29).

Two of the important compounds in licorice, namely licoricidin and licorisoflavan A, were found to be the most effective treating oral diseases (30). The root also helps prevent periodontitis,

The root is also known to freshen breath naturally (31). It may also prevent tooth decay (32).

14. May Aid Sleep

Studies done on mice state that one type of licorice root, called Glycyrrhiza glabra, can induce sleep and even increase sleep duration.

Two other compounds in licorice root, namely glabrol and liquiritigenin, may also play a role in this regard (33). More importantly, ethanol extracts of the root were found to increase the length of non-REM sleep in mice (34). 

15. May Be Beneficial For Hair Health

Research is limited in this regard. Proponents claim that the flavonoids, phytoestrogens, and other essential oils in the root may help promote hair health.

The demulcent (relieving irritation) properties of licorice root may help soothe scalp conditions like scabs and dandruff. Even though not scientifically proven, licorice tea is consumed by some people to combat premature balding.

Licorice may be used in preparing packs for the effective treatment of various hair conditions. You can add amla powder(Indian gooseberries) and henna to licorice tea and mix well. It is believed to treat hair conditions like dandruff, dull hair, split ends, and sun-induced hair damage.

However, topically applied glycyrrhizic acid (a compound of licorice) was found to cause hair removal in rats (35). Hence, consult your doctor before using licorice for hair health.

There are several ways of using licorice root to avail its health benefits. We will explore those in the following section.

Any Other Ways Of Using Licorice Root?

  • As a gel or cream: You can apply it to the affected areas on your skin. You can powder the root, mix it with water, and prepare a paste. You can also purchase licorice root gel from the nearest store.
  • As a powder: It may help treat skin issues, such as acne. Liquiritin, a skin-lightening compound in licorice, may lighten skin. You can purchase licorice root powder online.
  • As a tincture: You can take 3 to 4 drops of the juice.
  • As tea: Place the root in boiling water and allow it to simmer for about 10 minutes. You can take a cup before going to bed. You can also make tea with dried and crushed leaves of licorice.
  • As capsules: You can take them daily. Follow the dosage as mentioned on the product label. Always be sure to use licorice from a reputable vendor, and always run all supplements by your physician, as licorice may interact with various common drugs (like Warfarin, Lasix, Digoxin, Celebrex, Dilantin, Volatren) and other supplements. This is because licorice is metabolized by the liver’s Cytochrome P450 pathway, as are a lot of common drugs/supplements (36).
  • As a liquid extract:This is the most commonly used form of licorice root. You can get it from a store.
  • As a potential medication: It may help in treating Addison’s disease (a type of diabetes caused by hormonal deficiency) and lupus (an inflammatory disease caused by the immune system attacking the body’s tissues). However, since research is limited in these aspects, talk to your doctor before using licorice for this purpose.  

Where To Buy Licorice Root

You can get your licorice root (as a root or in the form of an extract) from the nearest supermarket store. You may also procure it online on Amazon.

Any Fast Facts On Licorice Root?

  • April 12th is National Licorice Day.
  • The modern licorice candy that you enjoy actually dates back to 17th century Holland.
  • The licorice plant is officially a weed.
  • Napoleon Bonaparte found licorice soothing during battles. It is believed he ate so much of it that his teeth turned black.
  • Alexander the Great and Julius Caesar are known to have had endorsed the benefits of eating licorice.

No matter how beneficial the root could be, there are certain aspects we need to consider. Licorice root may cause certain adverse effects. 

Any Side Effects Of Licorice Root?

Excess consumption of licorice root for a long time may cause adverse effects in some people. These may include heart ailments, hypokalemia, kidney problems, sexual problems in males, and hypertension in children.

  • May Cause Heart Problems

The root may increase blood pressure levels. This may aggravate heart ailments. Those with a history of congestive heart failure must avoid licorice (37).

  • May Cause Hypokalemia

Excessive intake of licorice can cause excessively low potassium levels in the body, which leads to hypokalemia (38). Hence, if you have low potassium levels, avoid licorice.

  • May Cause Kidney Disease

In some cases, individuals with licorice-induced hypertension had also experienced kidney failure (39).

  • May Aggravate Male Sexual Problems

Some studies show that licorice may reduce testosterone levels in males (25).

  • May Cause Hormonal Imbalances

Since licorice may act like estrogen in the body, it must be avoided if one has a condition that could be worsened by estrogen. Licorice contains a compound called isoliquiritigenin, which may interfere with the sex hormones in the ovaries and disrupt their production (40).

  • Issues During Pregnancy And Breastfeeding

Licorice root is unsafe during pregnancy and can lead to early delivery. The glycyrrhizin in licorice was found to be associated with preterm delivery. Hence, pregnant women are suggested to avoid licorice (41).

There is insufficient information on the effects of licorice during breastfeeding. Hence, stay safe and avoid its use.

  • Issues During Surgery

Since the root may interfere with blood pressure, it may cause issues during surgery. Stop intake of licorice at least two weeks before a scheduled surgery. However, research is limited in this area.

Licorice root has its share of adverse effects. But, in general, it can offer optimum health benefits. We have explored some of the important compounds in the root. In the following section, we will look at its detailed nutritional profile.

What Is The Nutritional Profile Of Licorice?

The root is composed of carbohydrates (starch, and sugars like glucose, fructose, and sucrose), minerals, and bioactive plant compounds. It also contains both soluble and insoluble fibers.

The most important bioactive substances in licorice are:

  • Glycyrrhizin, which is also called glycyrrhizic acid (42), is the most abundant compound in licorice root (3%) and extracts (10-25%).
  • Liquiritigenin (42), which is another important antioxidant and a phytoestrogen.
  • Other important compounds include glabridin and liquiritin (42).

What Is The Recommended Dosage Of Licorice Root?

The ideal dosage of licorice root depends on the health condition of the individual. However, people should never consume excessive amounts of licorice in food or supplement form.

If you are going for licorice root extract, limit your intake to four weeks. Deglycyrrhizinated licorice could be taken for longer periods. Since direct research is lacking this regard, consult your doctor for more information.

Drug Interactions

Warfarin (Coumadin), a blood thinner, may interact with the licorice and cause gastrointestinal bleeding (43). Patients who are at a risk of bleeding should avoid the consumption of licorice root and its supplements. People who are under medications for issues related to heart rhythm are also advised to avoid  licorice.

Licorice is usually available in one of two variants – deglycyrrhizinated licorice and licorice extract. Each seems to have its own advantages, but there is some ambiguity in this regard. We have addressed this in the following section.

Deglycyrrhizinated Licorice (DGL) Vs. Licorice Extract – Which Is Better?

There are four main types of compounds found in licorice root – flavonoids, coumarins, triterpenoids, and stilbenoids. These possess antioxidant, anti-inflammatory, and antibiotic properties.

Another important compound in licorice root is glycyrrhizin. This compound has potent anti-inflammatory properties.

This glycyrrhizin may also have certain side effects. Hence, this compound is removed from the root during the production of standardized licorice supplements. This is to prevent possible adverse effects like high blood pressure, kidney issues, and issues during pregnancy/breastfeeding, etc.

But without glycyrrhizin, the supplement can be used by a larger section of the society (this also means more sales). This form of licorice is called deglycyrrhizinated licorice.

The normal licorice extract is the one with glycyrrhizin, and it can be used by anyone without the contraindications. They can enjoy the benefits of glycyrrhizin as well.

Conclusion

Licorice is an ancient remedy with important health benefits. This medicinal root is commonly used to treat ailments related to the digestive and nervous systems, and the skin.

However, too much consumption of this root may cause serious side effects. Hence, people should always check with their doctor about its usage.

Expert’s Answers For Readers’ Questions

Is licorice a laxative?

Yes, licorice can have mild laxative effects.

How to eat licorice root sticks?

You can add the sticks to a teapot and extract the flavors. You can even chew the sticks.

43 sources

Stylecraze has strict sourcing guidelines and relies on peer-reviewed studies, academic research institutions, and medical associations. We avoid using tertiary references. You can learn more about how we ensure our content is accurate and current by reading our editorial policy.

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Ravi Teja Tadimalla

Ravi Teja Tadimalla is a Senior Content Writer who specializes in writing on Health and Wellness. He graduated from SRM University, Chennai, and has been in the field for well over 4 years now. His work involves extensive research on how one can maintain better health through natural foods and organic supplements. Ravi has written over 250 articles and is also a published author. Reading and theater are his other interests.
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