# Wasabi (Eutrema japonicum)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/wasabi
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-05
**Evidence Score:** 2 / 10
**Category:** Traditional Chinese Medicine
**Also Known As:** Japanese horseradish, Japanese wasabi, Hon-wasabi, Real wasabi, Mountain hollyhock, Wasabia japonica, Green mustard, Namida, Sawa-wasabi

## Overview

Wasabi (Eutrema japonicum) is a Japanese cruciferous plant whose primary bioactive compounds, isothiocyanates such as 6-methylsulfinylhexyl isothiocyanate (6-MSITC), are released upon enzymatic breakdown of glucosinolates by myrosinase. These isothiocyanates have been investigated for potential [antioxidant](/ingredients/condition/antioxidant), [anti-inflammatory](/ingredients/condition/inflammation), and [antimicrobial](/ingredients/condition/immune-support) properties, though human clinical evidence remains extremely limited.

## Health Benefits

• No human clinical trials were identified in the research provided • Chemical analysis shows presence of isothiocyanates which have been studied in other contexts • Contains glucosinolates found in other cruciferous vegetables • Research focuses on chemical composition and plant growth rather than health effects • Evidence quality: No clinical evidence available

## Mechanism of Action

When wasabi tissue is disrupted, the enzyme myrosinase hydrolyzes glucosinolates into isothiocyanates, particularly 6-methylsulfinylhexyl isothiocyanate (6-MSITC). These isothiocyanates can activate the Nrf2/Keap1 pathway, upregulating [antioxidant](/ingredients/condition/antioxidant) response elements and [phase II detox](/ingredients/condition/detox)ification enzymes such as glutathione S-transferase and NAD(P)H quinone oxidoreductase 1. Additionally, 6-MSITC has been shown in preclinical models to inhibit NF-κB signaling, thereby reducing [pro-inflammatory cytokine](/ingredients/condition/inflammation) production including TNF-α and IL-6.

## Clinical Summary

No published randomized controlled trials or formal human clinical studies specifically evaluating wasabi supplements for health outcomes were identified in the available research. Existing evidence derives primarily from in vitro cell studies and animal models examining 6-MSITC and related isothiocyanates, which limits the ability to draw conclusions about efficacy, effective dosing, or safety in humans. Some observational interest exists around wasabi consumption in traditional Japanese dietary patterns, but these associations have not been isolated in controlled research. The overall evidence base is considered preliminary, and claims about therapeutic benefits cannot currently be substantiated by clinical data.

## Nutritional Profile

Wasabi (Eutrema japonicum) rhizome contains approximately 69-74% water, with dry weight composition including: Carbohydrates ~56-60% of dry weight (primarily starch and soluble sugars), Protein ~15-18% of dry weight (notably higher than many root vegetables), Dietary fiber ~8-10% of dry weight, Fat ~1-3% of dry weight. Key micronutrients per 100g fresh weight: Potassium ~568mg, Calcium ~128mg, Vitamin C ~41mg, Magnesium ~69mg, Phosphorus ~80mg, Zinc ~1.6mg, Iron ~1.0mg, Sodium ~17mg. Primary bioactive compounds: Isothiocyanates (ITCs) — principally 6-methylsulfinylhexyl isothiocyanate (6-MSITC, also called wasabi) at approximately 0.45-1.2mg/g fresh rhizome, alongside allyl isothiocyanate (AITC) at lower concentrations (~0.1-0.3mg/g); these are hydrolysis products of glucosinolates activated by the enzyme myrosinase upon tissue disruption. Glucosinolates present include glucoerucin (~1.8-3.2µmol/g dry weight) and sinigrin (~0.8-1.5µmol/g dry weight). Additional phenolic compounds include hydroxycinnamic acid derivatives and flavonoids (quercetin, kaempferol glycosides) at ~0.3-0.8mg/g dry weight. Bioavailability notes: Isothiocyanate release is myrosinase-dependent and reduced significantly in processed or cooked forms; most commercial 'wasabi' products use horseradish substitute with lower 6-MSITC content; fresh grated rhizome provides highest bioavailable ITC concentration, though ITCs are volatile and degrade within 15-30 minutes of preparation.

## Dosage & Preparation

No clinically studied dosage ranges for extracts, powder, or standardized forms of wasabi were identified, as human trials are absent from available research. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Wasabi consumed as a food condiment is generally regarded as safe for most adults, but concentrated supplements providing high-dose isothiocyanates have not been evaluated in formal human safety trials. High intake of isothiocyanates from cruciferous vegetables as a class may interfere with iodine uptake and [thyroid function](/ingredients/condition/hormonal), suggesting caution for individuals with hypothyroidism or those taking thyroid medications such as levothyroxine. Wasabi may theoretically interact with anticoagulant drugs like warfarin due to potential effects on platelet aggregation observed in preclinical studies, though this has not been confirmed in humans. Pregnant and breastfeeding women should avoid supplemental doses beyond culinary amounts given the absence of safety data in these populations.

## Scientific Research

No human clinical trials, randomized controlled trials (RCTs), or meta-analyses on Eutrema japonicum (wasabi) were identified in the provided sources. Research focuses on chemical composition, nematicidal activity, nutritional profiles, and plant growth, with no PubMed PMIDs for human studies reported.

## Historical & Cultural Context

Eutrema japonicum has been used historically in Japanese, Korean, and Russian cuisines as a condiment from its rhizomes for its pungent flavor. The plant has been recognized as medicinal due to its isothiocyanate content, though specific traditional medicine systems or durations are not detailed in available sources.

## Synergistic Combinations

Other cruciferous vegetables, glucosinolate-containing plants, traditional Japanese herbs

## Frequently Asked Questions

### What is the active compound in wasabi that provides health benefits?

The primary bioactive compound in wasabi is 6-methylsulfinylhexyl isothiocyanate (6-MSITC), produced when myrosinase enzyme breaks down the glucosinolate glucoraphasatin upon cell disruption. This compound has demonstrated antioxidant and anti-inflammatory activity in laboratory and animal studies by activating Nrf2 signaling and inhibiting NF-κB pathways, though human data are not yet available.

### Is real wasabi different from the green paste served in most sushi restaurants?

Yes, most commercial 'wasabi' paste served in Western sushi restaurants is actually a blend of horseradish (Armoracia rusticana), mustard, and green food coloring, as genuine Eutrema japonicum is expensive and perishable. True wasabi contains a distinct glucosinolate profile, including glucoraphasatin, which produces 6-MSITC upon enzymatic hydrolysis, a compound not present in the same concentrations in horseradish-based substitutes.

### Can wasabi supplements help with inflammation?

Preclinical research shows 6-MSITC from wasabi can inhibit NF-κB activation and reduce TNF-α and IL-6 production in cell and animal models, suggesting anti-inflammatory potential. However, no human clinical trials have confirmed these effects in supplement form, so it is currently not possible to make evidence-based recommendations for wasabi supplements as an anti-inflammatory intervention.

### Is wasabi safe to take as a supplement if I have a thyroid condition?

Caution is advised for individuals with hypothyroidism or those taking thyroid hormone replacement therapy such as levothyroxine, because isothiocyanates from cruciferous plants as a class can inhibit thyroid peroxidase and compete with iodine uptake at high doses. While culinary amounts of wasabi are unlikely to pose a significant risk, concentrated isothiocyanate supplements have not been safety-tested in people with thyroid disorders, and consultation with a healthcare provider is recommended before use.

### What is the traditional use of wasabi in Kampo medicine?

In traditional Japanese Kampo medicine, wasabi has been used as a warming digestive stimulant and was believed to possess antimicrobial properties relevant to foodborne pathogens, which aligns with its historical use as a condiment with raw fish. Modern phytochemical analysis supports some antimicrobial activity of wasabi isothiocyanates against organisms including Helicobacter pylori and E. coli in vitro, though these traditional uses have not been validated through modern controlled clinical trials.

### How much wasabi should I take as a supplement, and how often?

There is no established clinical evidence or consensus dosage for wasabi supplements since human clinical trials have not been conducted on this ingredient. Most commercial wasabi supplements provide standardized extracts or powders, typically ranging from 500–1,500 mg per serving, but these dosages are not based on human efficacy data. It is recommended to follow the manufacturer's label instructions and consult a healthcare provider before starting any wasabi supplement, as appropriate dosing cannot be determined from the available research.

### Does wasabi interact with blood thinners, diabetes medications, or other common drugs?

While wasabi contains isothiocyanates that have been studied in laboratory settings, there is no clinical evidence documenting specific drug interactions with common medications. Because wasabi is a cruciferous vegetable-derived supplement, it may theoretically interact with blood thinners (such as warfarin) if consumed in very large amounts, similar to other cruciferous vegetables high in vitamin K. Anyone taking prescription medications should consult their healthcare provider before adding wasabi supplements to their regimen to rule out individual interactions.

### Is wasabi safe for pregnant women, children, or elderly individuals?

There are no clinical safety studies examining wasabi supplementation in pregnant women, children, or elderly populations, so safety cannot be confirmed for these groups. Wasabi is traditionally consumed in small amounts as a culinary condiment in Japanese cuisine, but concentrated supplement forms have not been evaluated for safety in vulnerable populations. Pregnant women, children, and older adults should consult a healthcare provider before taking wasabi supplements due to the lack of clinical evidence in these groups.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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