# Glycycoumarin

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/glycycoumarin
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-20
**Evidence Score:** 2 / 10
**Category:** Compound
**Also Known As:** Glycycoumarin, 7-methoxycoumarin-4-acetic acid, Licorice coumarin, Gan Cao coumarin, Glycyrrhiza coumarin derivative, Uralensis coumarin compound

## Overview

Glycycoumarin is a bioactive coumarin compound isolated primarily from licorice root (Glycyrrhiza uralensis) that exerts [anti-inflammatory](/ingredients/condition/inflammation) effects by potently suppressing inducible nitric oxide synthase (iNOS) activity. It also demonstrates [hepatoprotective](/ingredients/condition/detox), antibacterial, and [antiviral](/ingredients/condition/immune-support) properties in preclinical models, making it a compound of interest in liver health and infectious disease research.

## Health Benefits

• Exhibits [anti-inflammatory](/ingredients/condition/inflammation) properties by inhibiting NO production by over 80% at concentrations of 10 µmol/L, noted in preclinical studies. • Demonstrates liver protection effects in animal models, although specific studies are not cited. • Shows antibacterial and [antiviral](/ingredients/condition/immune-support) activities, including binding affinity to SARS-CoV-2 3CLpro, indicated by in vitro studies. • Acts as an [antioxidant](/ingredients/condition/antioxidant), supported by in vitro research. • Displays anti-hepatitis C virus activity in preclinical evaluations.

## Mechanism of Action

Glycycoumarin suppresses [inflammation](/ingredients/condition/inflammation) primarily by inhibiting inducible nitric oxide synthase (iNOS), reducing nitric oxide (NO) production by over 80% at concentrations of 10 µmol/L in macrophage models. It is also believed to downregulate pro-inflammatory transcription factors such as NF-κB, reducing downstream cytokine signaling cascades. Its [hepatoprotective](/ingredients/condition/detox) activity may involve modulation of [oxidative stress](/ingredients/condition/antioxidant) pathways, including upregulation of antioxidant enzyme expression such as superoxide dismutase (SOD) and catalase.

## Clinical Summary

The majority of evidence supporting glycycoumarin's effects comes from in vitro cell studies and in vivo animal models, with no substantial randomized controlled human clinical trials published to date. [Anti-inflammatory](/ingredients/condition/inflammation) activity has been quantified in macrophage cell line studies, where NO inhibition exceeded 80% at 10 µmol/L, a potent and specific finding. [Hepatoprotective](/ingredients/condition/detox) effects have been observed in rodent models of liver injury, though the specific study parameters and sample sizes remain incompletely documented in available literature. The overall evidence base is preclinical and promising but insufficient to establish clinical dosing guidelines or confirmed therapeutic efficacy in humans.

## Nutritional Profile

Glycycoumarin is a prenylated coumarin compound (molecular formula C20H18O5, molecular weight ~338.35 g/mol) isolated primarily from Glycyrrhiza uralensis (licorice root). It is classified as a bioactive secondary metabolite rather than a conventional nutritional ingredient, and thus lacks macronutrient or micronutrient content of its own. Key structural features include a coumarin core with a prenyl side chain and methoxy substitution, contributing to its lipophilic character and moderate bioavailability. As a pure compound, it contains no protein, fat, carbohydrates, fiber, vitamins, or minerals. Bioactive concentration data: [anti-inflammatory](/ingredients/condition/inflammation) activity (NO inhibition >80%) observed at 10 µmol/L in RAW 264.7 macrophage cell models; antibacterial and [antiviral](/ingredients/condition/immune-support) activity, including SARS-CoV-2 3CLpro binding, documented in in vitro assays at low micromolar ranges (estimated IC50 values in the 5–20 µmol/L range based on related prenylcoumarins). [Antioxidant](/ingredients/condition/antioxidant) capacity has been reported in DPPH and ABTS radical scavenging assays, with activity generally comparable to other licorice-derived flavonoids. Bioavailability is limited by its hydrophobic nature; oral absorption is estimated to be low without formulation enhancement, though the prenyl group may improve membrane permeability relative to non-prenylated coumarins. No established dietary reference intake or therapeutic dosing range is currently defined in clinical literature.

## Dosage & Preparation

There are no clinically studied dosage ranges reported for glycycoumarin. Preclinical studies have used concentrations up to 10 µmol/L for [anti-inflammatory](/ingredients/condition/inflammation) effects in vitro. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Glycycoumarin, as a coumarin-class compound, carries a theoretical risk of hepatotoxicity at high doses, consistent with concerns raised about synthetic coumarins, though direct toxicity data for glycycoumarin specifically are limited. Coumarins as a class may potentiate the effects of anticoagulant drugs such as warfarin by interfering with vitamin K-dependent clotting factor synthesis, and caution is warranted when combining glycycoumarin-containing supplements with blood thinners. Pregnancy and breastfeeding safety has not been established, and use during these periods should be avoided due to the lack of safety data. Individuals with existing liver conditions or those taking hepatically metabolized drugs should consult a healthcare provider before use.

## Scientific Research

No human clinical trials, RCTs, or meta-analyses have been identified for glycycoumarin. Current evidence is limited to preclinical studies involving in vitro and animal models.

## Historical & Cultural Context

Glycycoumarin is found in licorice plants, traditionally used in Chinese medicine. However, there are no specific historical uses attributed to this isolated compound.

## Synergistic Combinations

Licorice root extract, Vitamin C, Quercetin, Resveratrol, Curcumin

## Frequently Asked Questions

### What is glycycoumarin and where does it come from?

Glycycoumarin is a naturally occurring coumarin compound extracted from licorice root, specifically Glycyrrhiza uralensis, a plant widely used in traditional Chinese medicine. It belongs to the broader family of benzopyrone-derived polyphenols and is one of several bioactive constituents found alongside glycyrrhizin and liquiritin in licorice preparations.

### How does glycycoumarin reduce inflammation?

Glycycoumarin inhibits inducible nitric oxide synthase (iNOS), the enzyme responsible for producing pro-inflammatory nitric oxide (NO) in activated immune cells such as macrophages. At a concentration of 10 µmol/L, it has been shown to suppress NO production by more than 80% in preclinical cell studies, and it is also believed to interfere with NF-κB signaling, a master regulator of inflammatory gene expression.

### Does glycycoumarin protect the liver?

Preclinical animal studies suggest glycycoumarin exerts hepatoprotective effects, likely through reduction of oxidative stress and inflammation in liver tissue. While these findings are encouraging, specific study designs, sample sizes, and quantified outcomes for glycycoumarin's liver protection have not been comprehensively published, meaning the evidence remains preliminary and should not replace established liver therapies.

### Can glycycoumarin interact with blood thinners like warfarin?

As a member of the coumarin chemical class, glycycoumarin has a theoretical potential to interact with anticoagulant medications such as warfarin by influencing vitamin K-dependent clotting pathways. While direct pharmacokinetic interaction studies for glycycoumarin specifically are lacking, caution is strongly advised for anyone on anticoagulant therapy, and a healthcare provider should be consulted before combining these agents.

### Are there human clinical trials on glycycoumarin?

As of current available literature, there are no published human randomized controlled trials examining glycycoumarin as an isolated compound for any health condition. All quantified efficacy data — including the >80% NO inhibition figure — derive from in vitro cell assays or in vivo rodent models, which limits the direct applicability of these findings to human supplementation recommendations.

### What is the evidence quality for glycycoumarin's antiviral properties against COVID-19?

Glycycoumarin has shown binding affinity to SARS-CoV-2 3CLpro in in vitro studies, suggesting potential antiviral activity. However, this evidence remains limited to laboratory conditions and has not been validated in human clinical trials or animal infection models. Significantly more research is needed before any claims about COVID-19 prevention or treatment can be substantiated.

### Who should avoid glycycoumarin supplementation due to safety concerns?

Individuals taking anticoagulant medications (such as warfarin) should avoid glycycoumarin due to potential interaction risks with blood-thinning therapies. Pregnant and nursing women should consult healthcare providers before use, as safety data in these populations is limited. People with known coumarin sensitivities or severe liver or kidney disease should also exercise caution.

### How does glycycoumarin's antioxidant activity compare to its anti-inflammatory effects?

Glycycoumarin functions as both an antioxidant and anti-inflammatory agent, with its anti-inflammatory mechanism particularly well-characterized through NO production inhibition (>80% at 10 µmol/L in preclinical studies). While antioxidant activity has been noted, the relative potency and clinical significance of this antioxidant effect compared to its anti-inflammatory properties remains less documented in available research. Both mechanisms likely contribute to overall bioactivity, but anti-inflammatory effects appear to be the more extensively studied property.

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