Licorice Root
Licorice root is a traditional botanical used in many systems of herbal practice, often discussed for soothing mucous membranes and digestive comfort, with notable safety considerations.
Overview
Licorice root (Glycyrrhiza glabra and related species) is among the most widely referenced botanicals in the global herbal record, appearing in Traditional Chinese Medicine, Ayurveda, and European herbalism with a documented history spanning several thousand years. The root's intense natural sweetness — estimated at roughly 30 to 50 times the sweetness of sucrose — has also made it a significant flavoring agent in food, confectionery, and tobacco products. What distinguishes licorice from many other traditional botanicals is a well-characterized safety dimension: whole licorice root contains glycyrrhizin, a triterpenoid saponin whose effects on hormone metabolism and electrolyte balance are documented in the pharmacological literature and represent a meaningful consideration for certain populations. This dual identity — as both a widely used traditional herb and a substance with recognized physiological implications — makes licorice root one of the more nuanced entries in the botanical reference landscape. This page is educational and does not recommend use for any condition.
What it is
Licorice root is the dried root and stolon of Glycyrrhiza glabra (European licorice), Glycyrrhiza uralensis (Chinese licorice), or related species in the Fabaceae (legume) family. The root's chemical profile is complex, with glycyrrhizin — a triterpenoid saponin glycoside — being the most pharmacologically discussed compound, alongside flavonoids (including liquiritin and isoliquiritigenin), isoflavones, coumarins, and various phenolic compounds. Deglycyrrhizinated licorice (DGL) is a processed form from which most glycyrrhizin has been removed, creating a distinct product category with a different risk profile than whole-root preparations.
The consumer market for licorice products is broad and variable. Teas, powdered root, lozenges, tinctures, chewable tablets, and standardized extracts all carry different glycyrrhizin concentrations, and this variability has direct relevance to the safety considerations discussed below. Importantly, many commercial products labeled "licorice" — particularly confectionery — contain anise flavoring rather than actual licorice root, making ingredient lists rather than product names the relevant source of information about what a given product contains.
Traditional use (educational)
Licorice holds a particularly prominent position in Traditional Chinese Medicine (TCM), where Glycyrrhiza uralensis (gancao) appears in a remarkably large proportion of classical herbal formulas — some estimates suggest it is the most frequently used herb in the TCM pharmacopoeia. Its traditional role in Chinese formulation is often described as "harmonizing" other ingredients in multi-herb combinations, a conceptual framework specific to TCM theory rather than a pharmacological claim. In Ayurveda, licorice (yashtimadhu) carries its own traditional classification within the Indian system's organizational framework. European herbalism has referenced licorice root since at least the time of Theophrastus in the third century BCE, with later mentions by Dioscorides and throughout medieval herbal texts, typically in respiratory and digestive contexts.
In modern wellness culture, licorice appears in discussions of throat-related and digestive-related comfort, sometimes alongside Honey or mucilage-rich botanicals like Marshmallow root and Slippery elm. These traditional associations describe long-standing patterns of cultural use across multiple independent herbal systems — a breadth of traditional reference that is notable even among widely used herbs — rather than validated clinical findings.
What research says
The research landscape for licorice is extensive but uneven. In vitro and animal studies have examined various licorice-derived compounds — including glycyrrhizin, glycyrrhetinic acid, and several flavonoids — with preliminary findings of interest across multiple assay contexts. However, these laboratory observations describe behavior in isolated experimental systems and do not establish outcomes in human use. Clinical studies involving licorice preparations exist but are variable in quality, preparation type, and design — many involve multi-herb formulas where licorice is one component among several, making attribution of observed effects to licorice specifically difficult to establish.
The safety pharmacology of glycyrrhizin is, by contrast, comparatively well-characterized. The compound's influence on the enzyme 11-beta-hydroxysteroid dehydrogenase type 2 — and the downstream implications for cortisol metabolism and mineralocorticoid activity — is described in the pharmacological literature as a recognized mechanism, making the safety considerations for glycyrrhizin-containing licorice more firmly grounded than many of the herb's traditional use claims. This asymmetry — where the risk profile is better documented than the purported traditional applications — is an important contextual point in educational discussions of licorice root.
Safety & interactions
Glycyrrhizin-containing licorice is associated in the clinical and case-report literature with elevated blood pressure, low potassium (hypokalemia), fluid retention, and cardiac rhythm disturbances in susceptible individuals, particularly with sustained or concentrated exposure. These observations are well-documented enough that major pharmacological references include licorice in interaction discussions with diuretics, corticosteroids, cardiac glycosides, and antihypertensive medications, citing the compound's influence on electrolyte and fluid dynamics as the mechanistic basis.
DGL products carry a different glycyrrhizin exposure profile, but they are not automatically risk-free — formulations and the completeness of glycyrrhizin removal vary across manufacturers, and labeling does not always specify residual glycyrrhizin levels. The interaction landscape for licorice is notably complex, and individuals using licorice products alongside multiple medications or supplements encounter a context where additive or overlapping effects are a reasonable concern rather than a remote theoretical possibility.
Who should be cautious
Individuals with hypertension, cardiovascular conditions, kidney disease, or conditions involving electrolyte imbalance are consistently flagged in educational and safety-oriented literature as populations warranting particular awareness with glycyrrhizin-containing licorice. Pregnant individuals encounter strong cautionary framing in most conventional references, based on concerns about hormonal and blood-pressure-related effects documented in the pharmacological literature. Older adults and anyone taking multiple medications — particularly those affecting blood pressure, fluid balance, or electrolyte levels — encounter similar caution.
Those experiencing Heartburn or digestive discomfort may encounter licorice in products positioned in the digestive comfort space; in these contexts, distinguishing DGL from whole-root licorice is especially relevant, as the two product types carry fundamentally different glycyrrhizin exposure levels and therefore different safety profiles.
Quality & sourcing considerations
Quality variables for licorice root products include species identification (Glycyrrhiza glabra versus Glycyrrhiza uralensis versus other species), geographic origin, glycyrrhizin content, processing method, and contaminant testing. Because glycyrrhizin content can vary significantly between products — and because this variation has direct safety implications — standardized products that specify glycyrrhizin levels offer more transparency than loosely described powders or blends. Labeling practices across the licorice product market are inconsistent, and the distinction between whole-root preparations and DGL is not always clearly communicated on packaging.
Adulteration and substitution are recognized concerns in global herbal supply chains, and licorice root is not exempt. Third-party testing, clear botanical identification (Latin binomial, plant part used, extraction method), and transparent glycyrrhizin content labeling are considered meaningful quality indicators in educational sourcing evaluations. The species distinction is not trivial — G. glabra and G. uralensis have overlapping but non-identical chemical profiles, and the traditional use records associated with each are rooted in different herbal systems.
FAQs
Is DGL the same as licorice root?
No. DGL (deglycyrrhizinated licorice) is a processed form of licorice from which most of the glycyrrhizin has been removed. It is a distinct product category with a different composition and a different risk profile than whole-root licorice. The two are not interchangeable, and the safety considerations that apply to glycyrrhizin-containing licorice do not apply equally to DGL — though DGL is not inherently risk-free, and product quality varies.
Why is licorice considered risky for blood pressure?
Glycyrrhizin's documented influence on the enzyme 11-beta-hydroxysteroid dehydrogenase type 2 can alter cortisol metabolism in ways that affect sodium and potassium balance and fluid retention — a cascade that, in susceptible individuals, can translate to elevated blood pressure. This mechanism is described in pharmacological literature and is the basis for the cautionary framing that licorice receives in most conventional health references.
Does licorice candy equal licorice root?
Not necessarily. Many commercial "licorice" candies — particularly in North America — use anise flavoring rather than actual licorice root, and their ingredient lists reflect this. Some European licorice confectionery does contain real licorice extract, sometimes in meaningful concentrations. Checking ingredient labels is the only reliable way to determine whether a given product contains licorice root or a substitute flavoring.
Is licorice mainly for the throat?
In traditional herbal literature, licorice appears in both respiratory-themed and digestive-themed contexts, and its role in TCM formulation is broader still — described as a harmonizing agent across a wide range of multi-herb combinations. Its traditional identity is not limited to a single application area, though throat-related and digestive-related associations are among the most commonly cited in Western wellness discussions.