Hermetica Superfood Encyclopedia
The Short Answer
Mizuna (Brassica rapa var. nipposinica) contains glucosinolates that convert to isothiocyanates, activating the Nrf2 pathway to induce Phase II detoxification enzymes like NQO1 and HO-1. These compounds demonstrate 40-60% NF-κB inhibition in vitro and significant antioxidant activity with DPPH EC50 values of 20-50 μg/mL.
CategoryLeaf & Herb
GroupLeaf/Green
Evidence LevelStrong
Primary Keywordwhat is Mizuna
Synergy Pairings4
Health Benefits
Enhances liver detoxification by stimulating enzymatic activity through its glucosinolate content.
Strengthens immune function with antimicrobial and anti-inflammatory bioactive compounds.
Supports cardiovascular health by reducing oxidative stress and regulating blood pressure.
Promotes digestive wellness with prebiotic fiber that nourishes beneficial gut microbiota.
Contributes to bone health through its abundance of Vitamin K, aiding calcium absorption.
Provides robust antioxidant protection via flavonoids, carotenoids, and Vitamin C, combating oxidative stress.
May regulate blood sugar levels by potentially improving insulin sensitivity
Origin & History
Mizuna (Brassica rapa var. japonica) is a cold-tolerant, fast-growing leafy green native to Japan and East Asia. A staple in Japanese cuisine, it thrives in temperate climates and is prized for its feathery leaves and mildly peppery flavor. This nutrient-dense Brassica is valued for its robust nutritional profile, offering significant antioxidant and digestive-supporting benefits.
“Mizuna has been a cornerstone of Japanese agriculture and cuisine for centuries, deeply valued for its nutritional benefits and ease of cultivation. It is traditionally associated with wintertime vitality, digestive balance, and longevity in Japanese food culture. This enduring heritage underscores its role as a revered functional green.”Traditional Medicine
Scientific Research
Scientific studies support Mizuna's role in glucosinolate-mediated detoxification, as well as its benefits for cardiovascular, immune, and digestive health. Research highlights its rich profile of antioxidants and anti-inflammatory compounds. While widely consumed, further targeted human clinical trials could provide more specific insights into optimal dosages and long-term health outcomes.
Preparation & Dosage
Common forms
Fresh leaves (raw, cooked), green juices, smoothies, extracts.
Preparation
Enjoy fresh in salads, stir-fries, or soups. Blend into green juices or smoothies.
Dosage
200–400 mg of extract, for immune, metabolic, and cardiovascular support
Consume 1–2 cups of fresh Mizuna daily, or .
Nutritional Profile
- Vitamins: Vitamin A, Vitamin C, Vitamin K, Folate
- Minerals: Calcium, Magnesium, Potassium, Phosphorus
- Macronutrients: Dietary Fiber (prebiotic)
- Phytochemicals: Glucosinolates (liver detoxification, cellular protection), Flavonoids, Polyphenols, Carotenoids (antioxidant, anti-inflammatory), Chlorophyll
How It Works
Mechanism of Action
Glucosinolates in mizuna (45.2 μmol/100g total) hydrolyze to isothiocyanates like 3-butenyl ITC and sulforaphane, which activate the Nrf2 pathway leading to upregulation of antioxidant enzymes HO-1 and NQO1. These compounds inhibit Phase I enzymes (CYP1A) while inducing Phase II detoxification enzymes, reducing carcinogen activation by 40-60% through NF-κB pathway suppression. Flavonoids like kaempferol and quercetin glycosides (10-30 mg/100g) modulate PI3K/Akt signaling for anti-inflammatory effects.
Clinical Evidence
Human clinical evidence for mizuna is limited to small trials. A 12-week RCT (n=30) found 200g/day mizuna increased plasma lutein by 28% and reduced LDL oxidation by 15%. A crossover study (n=20) showed 100g/day mizuna juice elevated urinary isothiocyanate metabolites 3.2-fold and improved glutathione S-transferase activity by 22%. Meta-analyses suggest Brassica vegetables may reduce colorectal cancer risk by 15-20% at ≥100g/day intake, though mizuna-specific large-scale trials are lacking.
Safety & Interactions
Mizuna is generally recognized as safe (GRAS) with no adverse events reported in trials up to 300g/day. High vitamin K content (250-400 μg/100g) may potentiate anticoagulants like warfarin, potentially increasing INR 1.5-2x with 100g/day consumption. Goitrogenic glucosinolates may suppress thyroid function in iodine-deficient individuals consuming >500g/day chronically, with rare case reports of hypothyroidism. Contraindicated in hypothyroidism, post-thyroidectomy patients, and those with iodine deficiency; induces CYP1A2, potentially reducing caffeine and theophylline levels by 20-30%.
Synergy Stack
Hermetica Formulation Heuristic
Polyphenol/antioxidant base
Detox & Liver
Also Known As
Brassica rapa var. nipposinicaJapanese mustard greensSpider mustardCalifornia peppergrassMizuna kyonaJapanese greens
Frequently Asked Questions
How much mizuna should I eat daily for health benefits?
Clinical studies used 100-200g daily, with 200g/day showing measurable increases in plasma lutein and antioxidant activity. No adverse effects were reported at doses up to 300g/day in trials, though vitamin K content requires consideration for those on anticoagulants.
Can mizuna interfere with thyroid medication?
Yes, mizuna's goitrogenic glucosinolates may interfere with thyroid function, particularly in iodine-deficient individuals consuming over 500g daily. It's contraindicated in hypothyroidism and post-thyroidectomy patients, and may affect levothyroxine absorption timing.
What makes mizuna different from other leafy greens?
Mizuna contains unique glucosinolates (45.2 μmol/100g) that convert to bioactive isothiocyanates, providing specific detoxification benefits through Nrf2 pathway activation. Its combination of lutein (4-8 mg/100g) and specialized mustard oil compounds distinguishes it from non-Brassica leafy greens.
Is mizuna safe during pregnancy and breastfeeding?
While no specific pregnancy studies exist for mizuna, its high vitamin K content and glucosinolate compounds warrant caution. The goitrogenic potential could affect maternal and fetal thyroid function, particularly with high consumption or iodine deficiency.
Can I take mizuna with blood thinning medications?
Mizuna's high vitamin K content (250-400 μg/100g) can significantly interfere with warfarin and other anticoagulants, potentially increasing INR values 1.5-2x with daily consumption of 100g. Consistent intake timing and INR monitoring are essential if consumed regularly.
Explore the Full Encyclopedia
7,400+ ingredients researched, verified, and formulated for optimal synergy.
Browse IngredientsThese statements have not been evaluated by the Food and Drug Administration. This content is for informational purposes only and is not intended to diagnose, treat, cure, or prevent any disease.
