# Costunolide

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/costunolide
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-28
**Evidence Score:** 4 / 10
**Category:** Compound
**Also Known As:** Kuth, Mu Xiang, Costus lactone, Saussurea costus extract, Costus root compound, 11,13-dihydrocostunolide precursor, Sesquiterpene lactone from Asteraceae

## Overview

Costunolide is a sesquiterpene lactone compound found in plants like Costus and Saussurea species that exhibits [anti-inflammatory](/ingredients/condition/inflammation) activity through NF-κB pathway inhibition. This bioactive compound demonstrates potential anticancer effects by modulating STAT3/NF-κB signaling pathways in preclinical studies.

## Health Benefits

• [Anti-inflammatory](/ingredients/condition/inflammation) effects demonstrated in preclinical models through NF-κB pathway inhibition (animal studies only)
• Anticancer potential shown in cell lines and mouse xenografts via STAT3/NF-κB modulation (PMID: 22114962, no human data)
• [Neuroprotective](/ingredients/condition/cognitive) activity through Nrf2/HO-1 pathway activation (preclinical evidence only)
• Antidiabetic effects observed in rodent models (no clinical validation)
• [Antimicrobial](/ingredients/condition/immune-support) properties against various pathogens (in vitro studies only, no human trials)

## Mechanism of Action

Costunolide inhibits the nuclear factor-κB (NF-κB) signaling pathway by preventing phosphorylation and nuclear translocation of p65 subunit. The compound also modulates STAT3 (Signal Transducer and Activator of Transcription 3) pathway and activates the Nrf2/HO-1 antioxidant defense system. These molecular interactions result in reduced [inflammatory](/ingredients/condition/inflammation) cytokine production and enhanced cellular protection against [oxidative stress](/ingredients/condition/antioxidant).

## Clinical Summary

Research on costunolide is limited to preclinical studies using cell lines and animal models. Mouse xenograft studies have shown anticancer effects against various cancer cell lines through STAT3/NF-κB modulation. [Anti-inflammatory](/ingredients/condition/inflammation) effects have been demonstrated in rodent models of inflammation with significant reductions in pro-inflammatory markers. No human clinical trials or safety data are currently available for costunolide supplementation.

## Nutritional Profile

Costunolide is a sesquiterpene lactone bioactive compound, not a nutritional ingredient in the conventional sense — it contains no meaningful macronutrients (protein, carbohydrates, fat), dietary fiber, vitamins, or minerals in relevant quantities. Its profile is defined entirely by its bioactive phytochemical nature: Molecular formula C15H20O2, molecular weight 232.32 g/mol, classified as a germacrane-type sesquiterpene lactone. Naturally found in Saussurea lappa (costus root) at concentrations of approximately 0.3–1.2% of dry root extract, also present in Magnolia grandiflora, Laurus nobilis, and chicory (Cichorium intybus) at trace levels (typically <0.1% dry weight). The alpha-methylene-gamma-lactone moiety is its primary pharmacophore responsible for biological activity through Michael addition reactions with cysteine residues in target proteins. Bioavailability is notably limited due to poor aqueous solubility (log P approximately 3.2, low water solubility ~2.4 mg/L), rapid first-pass [metabolism](/ingredients/condition/weight-management), and instability at alkaline pH. Preclinical pharmacokinetic data in rodents indicates rapid absorption but extensive hepatic metabolism, with primary metabolites including dihydrocostunolide and costunolide epoxide. Nanoparticle encapsulation and lipid-based delivery systems have been studied to improve bioavailability. No established dietary reference intake or tolerable upper limit exists; no food-based nutritional contribution is applicable.

## Dosage & Preparation

No clinically studied dosages exist due to absence of human trials. Preclinical studies used 3-35 μM concentrations in vitro and 10-50 mg/kg in rodent models. Commercial products are not standardized for human use, with no established therapeutic ranges. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Safety data for costunolide in humans is not established due to lack of clinical trials. As a sesquiterpene lactone, it may cause allergic reactions in sensitive individuals, particularly those with compositae plant allergies. Potential interactions with immunosuppressive medications and chemotherapy drugs are theoretically possible due to its effects on [NF-κB](/ingredients/condition/inflammation) and STAT3 pathways. Pregnant and breastfeeding women should avoid costunolide supplements due to insufficient safety data.

## Scientific Research

No human clinical trials, randomized controlled trials (RCTs), or meta-analyses exist for costunolide as a standalone agent. All evidence is limited to preclinical in vitro studies and animal models, including anticancer effects in cell lines (PMID: 22114962) and [anti-inflammatory](/ingredients/condition/inflammation) activity in rodents at 10-50 mg/kg doses (PMC6627852).

## Historical & Cultural Context

Costus root containing costunolide has been used in Ayurvedic medicine (as 'Kuth') and Traditional Chinese Medicine (as 'Mu Xiang') for over 1,000 years for digestive disorders, respiratory issues, and [inflammation](/ingredients/condition/inflammation). Historical texts including the Charaka Samhita (~300 BCE) and Bencao Gangmu (16th century) document its traditional applications.

## Synergistic Combinations

Piperine, Curcumin, Boswellia serrata, Ginger extract, Quercetin

## Frequently Asked Questions

### What plants contain costunolide naturally?

Costunolide is found in Costus speciosus, Saussurea lappa, Aucklandia lappa, and various Artemisia species. The highest concentrations are typically found in the roots and rhizomes of these medicinal plants.

### How does costunolide compare to curcumin for inflammation?

Both compounds inhibit NF-κB signaling, but costunolide also modulates STAT3 pathways while curcumin targets additional inflammatory enzymes like COX-2. Curcumin has extensive human clinical data, whereas costunolide research remains limited to animal studies.

### What cancers has costunolide been studied against?

Preclinical studies have tested costunolide against breast cancer (MCF-7), lung cancer (A549), colon cancer (HCT116), and hepatocellular carcinoma cell lines. Mouse xenograft models showed tumor growth inhibition, but no human cancer trials exist.

### Is costunolide available as a dietary supplement?

Costunolide is not commonly available as a standalone supplement due to limited safety data. It may be present in traditional herbal extracts containing Costus or Saussurea species, but standardized costunolide supplements are rare in the market.

### What is the bioavailability of costunolide?

Bioavailability studies for costunolide in humans are lacking. Animal pharmacokinetic data suggests rapid metabolism and elimination, but specific absorption rates, plasma concentrations, and optimal dosing regimens have not been established for human use.

### What does the research say about costunolide's safety and toxicity in humans?

Current safety data on costunolide comes exclusively from preclinical studies in cell cultures and animal models, with no human clinical trials published to date. Animal toxicity studies suggest a relatively benign profile at tested doses, but human safety limits, potential adverse effects, and long-term tolerability remain unknown. Anyone considering costunolide supplementation should consult a healthcare provider, as insufficient human data prevents definitive safety claims.

### Does costunolide interact with common medications or treatments?

Drug interaction data for costunolide is limited to theoretical concerns based on its NF-κB and STAT3 pathway modulation observed in preclinical studies. Because costunolide may influence inflammatory signaling pathways, potential interactions with immunosuppressants, corticosteroids, or cancer therapies cannot be ruled out without human studies. Concurrent use with medications should only occur under medical supervision to assess individual risk.

### Why is the evidence for costunolide's health benefits still considered preliminary?

Costunolide's anti-inflammatory, anticancer, and neuroprotective effects have been demonstrated only in cell lines and animal models, with zero completed human clinical trials published. Preclinical findings often fail to translate to human efficacy due to differences in metabolism, dosing, and biological context. Significant additional research, including Phase I and Phase II human trials, is required before costunolide can be recommended for any specific health condition in humans.

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