Licorice Root and Liver Support: What We Know So Far

Licorice root has been in the herbal record for thousands of years and in the safety literature for decades. Both of those things are true at the same time, and the useful version of this article holds them together: what is interesting about the plant, and what is genuinely risky about one of its compounds.

What licorice root is

The plant is Glycyrrhiza glabra, and the part used is the root. Its best-known constituent is glycyrrhizin, a saponin that is roughly fifty times sweeter than sugar, which is why licorice has spent as much of its history in confectionery as in medicine. The root also carries flavonoids such as liquiritin and glabridin.

Keeping those two groups separate is important, because almost every safety discussion concerns glycyrrhizin specifically, while a good deal of the research interest involves the whole extract or the flavonoid fraction.

Why glycyrrhizin is the compound to watch

The mechanism is well documented and worth knowing. Glycyrrhizin inhibits an enzyme called 11-beta-hydroxysteroid dehydrogenase type 2, which normally converts active cortisol into inactive cortisone in the kidney. When that enzyme is blocked, cortisol keeps acting on the mineralocorticoid receptor.

The downstream effect is that the body holds sodium and loses potassium, which can raise blood pressure and cause fluid retention. Clinicians call the pattern apparent mineralocorticoid excess. It is dose and duration dependent, it reverses when intake stops, and it has been documented repeatedly in case reports involving licorice candy, not just concentrated supplements.

What people get wrong about safety

The first mistake is assuming that a traditional plant is inherently gentle. Traditional use tells you a plant has been used for a long time. It does not tell you the dose response, and for glycyrrhizin the dose response is unusually clear.

The second is not noticing which form is in the bottle. Deglycyrrhizinated licorice, usually labelled DGL, has most of the glycyrrhizin removed, and it is the form typically used for digestive comfort rather than for anything liver-related. Two products both called licorice can behave very differently.

The third is duration. Short-term use and indefinite daily use are not the same question, and a product that gives no guidance on how long to take it has not thought about the part of the record that matters most.

Who should be careful

Anyone with high blood pressure, a heart or kidney condition, or low potassium should treat glycyrrhizin-containing licorice as a conversation with a clinician, not a purchase decision. The same applies during pregnancy.

Interactions are the other half. Diuretics, blood pressure medicines, digoxin, warfarin and corticosteroids all sit on the list that matters, because each interacts with the mineralocorticoid or potassium picture described above. If any of those are in your medicine cabinet, this is not a self-directed supplement.

What the liver research actually looks like

The honest summary is that most of the liver-specific work is preclinical. Cell and animal studies describe antioxidant and anti-inflammatory activity for various licorice constituents, and that is a reasonable starting point for interest rather than a basis for a claim.

There are also clinical settings, in some countries, where glycyrrhizin preparations are administered under medical supervision. That is a prescription context with monitoring, and it has almost nothing in common with a bottle of root extract bought online. Conflating the two is one of the more common dishonest moves in this category.

The gap between those two settings is the practical point. In a supervised context, blood pressure and potassium are watched, which are precisely the variables glycyrrhizin disturbs. Nobody watches them at home. That is why the safety section on this particular plant is longer than the research section, and why it should be.

How to read a label

Start with the question the label most often avoids: does it state glycyrrhizin content, and does it say DGL? Then check whether licorice is sitting inside a proprietary blend, because that makes the amount unknowable. Then look for duration guidance, which a careful brand will give and a careless one will not.

Finally, read the verbs. Brands that understand the category say support and maintain. If you would rather work at the whole-food end of the shelf than with an isolated botanical, nutrient-dense options are the other direction people take.

Key takeaways

• Licorice root's main active is glycyrrhizin, a saponin roughly fifty times sweeter than sugar.
• Glycyrrhizin blocks the enzyme that inactivates cortisol in the kidney, which can raise blood pressure and lower potassium.
• DGL has most glycyrrhizin removed and behaves quite differently from whole root extract.
• Anyone with hypertension, kidney or heart conditions, or on diuretics or digoxin should consult a clinician first.
• Liver evidence is largely preclinical; preparations used in clinical settings are a separate, supervised context.

Frequently asked questions

Is licorice root safe to take every day?

That depends entirely on whether glycyrrhizin is present and how much. Indefinite daily use of glycyrrhizin-containing root is where the blood pressure and potassium case reports come from, so duration guidance matters.

What does deglycyrrhizinated mean?

Usually shortened to DGL, it means most of the glycyrrhizin has been removed. It is the form most often used for digestive comfort, and it carries far less of the mineralocorticoid concern than whole root.

Can I take it alongside blood pressure medication?

Not without asking the prescriber. Glycyrrhizin works against the direction most blood pressure treatment is trying to move, and the interaction is well described rather than theoretical.

Is the candy version a concern too?

It can be. The published case reports involve real licorice candy, not only supplements, which is a useful reminder that dose and duration are what matter here rather than the format.

Related supplements

If you want to explore this area, Liver Support Liquid Drops and TUDCA 1000mg Gummies with Milk Thistle are a practical place to start, formulated to sit alongside the everyday habits covered here.

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. Talk to a healthcare professional before starting any new supplement, especially if you are pregnant, nursing, taking medication, or managing a health condition.