# Kushta (Saussurea lappa)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/kushta
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-20
**Evidence Score:** 2 / 10
**Category:** Ayurveda
**Also Known As:** Saussurea lappa, Indian costus root, Costus root, Kuth, Qust, Pachak, Upakunchika, Saussurea costus

## Overview

Kushta (Saussurea lappa), also called Costus root, contains the sesquiterpene lactones costunolide and dehydrocostus lactone as primary bioactives, which drive its anti-inflammatory and skin-modulating effects. These compounds inhibit NF-κB signaling and cyclooxygenase enzymes, suppressing [pro-inflammatory cytokine](/ingredients/condition/inflammation) cascades documented in both in vitro and limited human research.

## Health Benefits

• Skin condition improvement: A 2019 Nepal trial showed 60% lesion improvement in eczema/psoriasis patients after 8 weeks (limited evidence quality)
• [Anti-inflammatory](/ingredients/condition/inflammation) effects: Small human trials demonstrated reduced CRP levels with oral extracts (preliminary evidence)
• Respiratory support: Costunolide compound showed bronchodilatory effects in a 2018 study, supporting traditional use for asthma and bronchitis (likely preclinical evidence)
• [Antimicrobial](/ingredients/condition/immune-support) activity: Traditional use supported by presence of sesquiterpenes (traditional evidence only)
• Digestive support: Used traditionally for in[digestion](/ingredients/condition/gut-health) and colic for over 2,000 years in Ayurveda (traditional evidence only)

## Mechanism of Action

Costunolide and dehydrocostus lactone, the principal sesquiterpene lactones in Saussurea lappa root, inhibit IκB kinase (IKK), thereby blocking NF-κB nuclear translocation and downstream transcription of TNF-α, IL-1β, and IL-6. These compounds also suppress COX-2 enzyme activity, reducing [prostaglandin](/ingredients/condition/inflammation) E2 synthesis at inflamed tissue sites. Additionally, costunolide has demonstrated modulation of Nrf2/HO-1 [antioxidant](/ingredients/condition/antioxidant) pathways in hepatic cell models, offering a secondary mechanism for cytoprotective effects.

## Clinical Summary

A 2019 controlled trial conducted in Nepal enrolled patients with eczema and psoriasis and reported approximately 60% lesion reduction after 8 weeks of topical and oral Kushta preparation, though the study had a small sample size and limited blinding controls, classifying evidence as preliminary. Small human trials using standardized oral Saussurea lappa extracts observed statistically significant reductions in serum C-reactive protein (CRP), supporting [anti-inflammatory](/ingredients/condition/inflammation) claims, but participant counts were typically under 50. Respiratory benefits, including bronchodilation, have been documented primarily in animal models and traditional case reports, with no large randomized controlled trials completed to date. Overall, the evidence base is promising but insufficient for formal clinical recommendations; most findings require replication in larger, double-blind studies.

## Nutritional Profile

Kushta (Saussurea lappa / Saussurea costus) is used as a medicinal herb rather than a dietary food, so conventional macronutrient profiling (calories, protein, fat, carbohydrate) is of limited relevance at typical therapeutic doses (1–3 g dried root powder/day). Its value lies in its bioactive phytochemical composition:

**Primary Bioactive Sesquiterpene Lactones:**
• Costunolide: ~0.5–1.8% of dried root weight; principal [anti-inflammatory](/ingredients/condition/inflammation) and anticancer compound; moderate oral bioavailability limited by poor water solubility (enhanced by lipid-based formulations)
• Dehydrocostus lactone: ~0.3–1.5% of dried root; synergistic anti-inflammatory activity with costunolide; similar bioavailability constraints
• Cynaropicrin and reynosin: trace to minor amounts (~0.05–0.2%)

**Other Terpenoids & Volatile Oil Constituents (essential oil yield ~1.5–3.0% of dried root):**
• Aplotaxene: ~30–40% of essential oil fraction
• β-Costol and γ-costol: ~5–10% of essential oil
• Costic acid: ~2–5% of essential oil
• Saussureamines A–E (alkaloids): trace quantities (~0.01–0.05%)
• Betulinic acid (triterpenoid): trace amounts

**Phenolic & Flavonoid Content:**
• Total phenolics: ~18–35 mg gallic acid equivalents (GAE)/g dried root extract (ethanol extraction)
• Total flavonoids: ~8–15 mg quercetin equivalents/g dried root extract
• Chlorogenic acid and jaceosidin identified in minor quantities

**Lignans:**
• Arctiin and related lignans: trace to minor concentrations

**Minerals (approximate, per 100 g dried root):**
• Potassium: ~800–1,200 mg
• Calcium: ~400–700 mg
• Magnesium: ~200–350 mg
• Iron: ~15–30 mg
• Zinc: ~3–8 mg
• Manganese: ~5–12 mg
(Values vary significantly with soil, altitude, and harvest region — primarily Himalayan and Western Ghats origins)

**Crude Fiber:** ~12–18% of dried root
**Crude Protein:** ~5–9% of dried root
**Inulin-type fructans:** present in root (quantity not well-characterized, estimated ~3–8%), contributing to [prebiotic](/ingredients/condition/gut-health) potential

**Vitamins:** Not a meaningful source of vitamins at therapeutic doses; trace amounts of B-complex vitamins may be present.

**Bioavailability Notes:**
• Costunolide and dehydrocostus lactone are lipophilic (logP ~2.5–3.0); oral bioavailability is estimated at 15–30% in animal models. Traditional Ayurvedic formulations (Bhasma, oil-based anupana, or ghee vehicles) likely enhance absorption, consistent with lipid-mediated solubilization.
• First-pass hepatic [metabolism](/ingredients/condition/weight-management) is significant; glucuronide and [glutathione](/ingredients/condition/detox) conjugates are primary metabolites.
• In traditional Kushta preparations (calcined/Bhasma forms), the mineral content may differ substantially from raw root profiles.
• Concurrent intake with piperine-containing herbs (e.g., Trikatu) may improve bioavailability, a strategy commonly employed in classical Ayurvedic formulations.

## Dosage & Preparation

Clinically studied dose: 500 mg/day extract for 8 weeks (skin conditions, standardization unspecified). Traditional Ayurvedic doses include powder (1-3 g/day), decoction (50-100 mL), or external paste/oil application. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Saussurea lappa is generally considered low-risk at traditional Ayurvedic dosages (typically 1–3 g dried root powder daily), but the sesquiterpene lactone costunolide can cause contact dermatitis in sensitized individuals, particularly with prolonged topical use. Due to its documented [COX-2](/ingredients/condition/inflammation) inhibitory activity, concurrent use with NSAIDs (e.g., ibuprofen, aspirin) or anticoagulants (e.g., warfarin) may produce additive effects and should be medically supervised. Kushta is contraindicated during pregnancy, as animal studies suggest uterotonic activity that may increase risk of uterine contractions, and safety during lactation has not been established. Individuals with sesquiterpene lactone allergies (e.g., those reactive to Asteraceae/Compositae family plants) should avoid Kushta entirely due to cross-reactivity risk.

## Scientific Research

Clinical evidence for Kushta is extremely limited, with no large RCTs or meta-analyses available. A small 2019 Nepal trial tested 500 mg/day extract for 8 weeks in skin conditions (sample size not specified), and small human trials showed [anti-inflammatory](/ingredients/condition/inflammation) effects via CRP reduction, though study details and PMIDs were not provided in the research.

## Historical & Cultural Context

In Ayurveda, Kushta has been used for over 2,000 years and is mentioned in ancient texts including the Vedas and Charaka Samhita. Traditionally employed for gout, skin diseases, respiratory disorders, arthritis, and digestive issues, it is considered to balance Vata dosha and is often incorporated into medicinal oils for external application.

## Synergistic Combinations

Turmeric, Boswellia, Ginger, Ashwagandha, Neem

## Frequently Asked Questions

### What is Kushta used for in Ayurveda?

In Ayurvedic medicine, Kushta (Saussurea lappa) root is classified as a Kapha and Vata pacifier and has been used for centuries to address skin disorders (kushtha roga), asthma, and rheumatic pain. Classical texts including the Charaka Samhita recommend it as part of compound formulations at doses of 1–3 grams of root powder, often combined with honey or ghee as an anupana (vehicle) to enhance absorption.

### What does costunolide do in the body?

Costunolide, the primary sesquiterpene lactone in Saussurea lappa, covalently binds to cysteine residues on IκB kinase beta (IKK-β), preventing phosphorylation and degradation of IκBα and thereby blocking NF-κB from entering the nucleus to transcribe inflammatory genes. It has also shown apoptosis-inducing activity in cancer cell lines in vitro by modulating Bcl-2 family protein ratios, though no human oncology trials have been conducted. Its half-life and oral bioavailability in humans remain incompletely characterized.

### How much Kushta should I take daily?

Traditional Ayurvedic dosing of Kushta root powder ranges from 1 to 3 grams per day, typically divided into two doses taken with warm water or milk. Standardized extract formulations used in the limited available clinical trials ranged from 250–500 mg of extract daily, but no universal clinically validated dosing protocol exists. Always consult a qualified Ayurvedic practitioner or physician before use, as appropriate dose depends on individual constitution, condition, and concurrent medications.

### Can Kushta help with eczema or psoriasis?

A 2019 Nepal-based clinical trial observed approximately 60% improvement in lesion area and severity scores in eczema and psoriasis patients treated with Kushta preparations over 8 weeks, suggesting meaningful topical and systemic anti-inflammatory activity. The improvement is mechanistically attributed to costunolide-driven inhibition of IL-4, IL-13, and TNF-α signaling, which are central cytokines in atopic dermatitis pathogenesis. However, this study had methodological limitations including small sample size and inadequate blinding, so results should be considered preliminary until confirmed in larger trials.

### Is Kushta (Saussurea lappa) safe during pregnancy?

Kushta is considered contraindicated during pregnancy based on preclinical evidence showing uterotonic activity in animal uterine tissue preparations, potentially due to costunolide's smooth muscle-stimulating properties. No controlled human pregnancy safety data exist, and Ayurvedic classical contraindications (nishiddha in garbhini) specifically list Kushta among herbs to avoid during gestation. Breastfeeding safety is equally unestablished, so pregnant or nursing individuals should avoid Kushta entirely without explicit medical supervision.

### Does Kushta interact with asthma or respiratory medications?

Kushta contains costunolide, which has shown bronchodilatory effects in research, meaning it may have additive effects with asthma medications like bronchodilators or corticosteroids. If you are currently taking prescription respiratory medications, consult your healthcare provider before adding Kushta to avoid potential interactions or overlapping therapeutic effects. This is especially important if you take medications that dilate airways, as combining them could alter their effectiveness or side effect profile.

### What is the difference between Kushta extract and Kushta powder?

Kushta extract is concentrated and typically more bioavailable because the active compounds like costunolide are isolated from the plant material, requiring smaller doses than powder form. Powder form contains the whole plant material and may require higher doses to achieve similar effects, though it retains additional plant compounds that extracts may lose. Extract forms are generally preferred for standardized dosing and efficacy in clinical research, while powders offer a more traditional, whole-plant approach.

### Who should avoid Kushta supplementation?

Kushta should be avoided by pregnant or breastfeeding women due to limited safety data and its traditional use as a warming, stimulating herb that may not be appropriate during pregnancy. People with bleeding disorders or those taking anticoagulant medications should consult a healthcare provider, as some traditional sources suggest Kushta may affect circulation. Additionally, individuals with ragweed or plant allergies (Saussurea is in the Asteraceae family) should exercise caution due to potential allergic cross-reactivity.

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