# Savoy Cabbage (Brassica oleracea var. sabauda)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/savoy-cabbage
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-04-01
**Evidence Score:** 2 / 10
**Category:** Vegetable
**Also Known As:** Brassica oleracea var. sabauda, crinkled cabbage, curly cabbage, Milan cabbage, wrinkled cabbage, savoy, Savoyer Kohl, chou de Savoie, cavolo verza

## Overview

Savoy cabbage (Brassica oleracea var. sabauda) is a cruciferous vegetable rich in glucosinolates, particularly sinigrin and glucobrassicin, which are hydrolyzed by myrosinase into bioactive isothiocyanates such as allyl isothiocyanate. These compounds drive its antioxidant, [antimicrobial](/ingredients/condition/immune-support), and potential [neuroprotective effect](/ingredients/condition/cognitive)s through modulation of [oxidative stress](/ingredients/condition/antioxidant) pathways and bacterial membrane disruption.

## Health Benefits

• Antibacterial activity against S. aureus, P. aeruginosa, K. pneumoniae, and Candida species (in vitro evidence only)
• Potential [neuroprotective effect](/ingredients/condition/cognitive)s based on related cabbage varieties showing protection against α-synuclein aggregation (in vitro/C. elegans models)
• [Antioxidant](/ingredients/condition/antioxidant) properties through ROS scavenging mechanisms (animal model evidence from related cabbages)
• Enhanced selenium content when biofortified, potentially supporting antioxidant enzyme activity (plant studies only)
• Possible support for cellular stress resistance and [longevity](/ingredients/condition/longevity) based on C. elegans studies of related cabbage extracts (preliminary evidence)

## Mechanism of Action

Glucosinolates in savoy cabbage are enzymatically cleaved by myrosinase upon cell damage to yield isothiocyanates (e.g., allyl isothiocyanate) and indoles (e.g., indole-3-carbinol), which activate the Nrf2/ARE pathway to upregulate endogenous [antioxidant](/ingredients/condition/antioxidant) enzymes including superoxide dismutase and [glutathione](/ingredients/condition/detox) peroxidase. [Antimicrobial](/ingredients/condition/immune-support) activity is attributed to isothiocyanate-mediated disruption of bacterial cell membrane integrity and inhibition of biofilm formation in pathogens such as S. aureus and P. aeruginosa. [Neuroprotective](/ingredients/condition/cognitive) potential, observed in C. elegans models using related Brassica varieties, is linked to reduction of α-synuclein aggregation, possibly through modulation of proteostasis networks and [mitochondrial](/ingredients/condition/energy) redox balance.

## Clinical Summary

Current evidence for savoy cabbage's therapeutic properties derives primarily from in vitro studies and invertebrate model organisms (C. elegans), with no large-scale randomized controlled trials specific to this variety. [Antimicrobial](/ingredients/condition/immune-support) activity against S. aureus, P. aeruginosa, K. pneumoniae, and Candida species has been demonstrated in cell-based assays, but these findings have not been validated in human or animal infection models. [Antioxidant](/ingredients/condition/antioxidant) capacity has been quantified using DPPH and FRAP assays, showing meaningful radical-scavenging activity attributed to flavonoids, anthocyanins, and ascorbic acid content, though human bioavailability studies are lacking. Overall, the evidence base is preliminary; extrapolating in vitro results to clinical outcomes requires significant caution.

## Nutritional Profile

Per 100 g raw savoy cabbage: Energy ~27 kcal; Water ~91 g; Protein ~2.0 g; Total fat ~0.1 g; Carbohydrates ~6.1 g (of which sugars ~2.3 g); Dietary fiber ~3.1 g (mixture of soluble and insoluble, including pectin and cellulose). Vitamins: Vitamin C ~31 mg (35% DV; bioavailability high but degrades significantly with prolonged cooking — steaming preserves ~80%, boiling retains ~50%), Vitamin K1 (phylloquinone) ~68.8 µg (~57% DV; fat-soluble, bioavailability enhanced when consumed with dietary fat), Folate (B9) ~80 µg (~20% DV; polyglutamate form with ~50% bioavailability compared to folic acid), Vitamin B6 ~0.19 mg, Vitamin A (as beta-carotene) ~50 µg RAE (~600 µg beta-carotene; bioavailability ~3–6% conversion efficiency, improved with fat co-ingestion), Riboflavin (B2) ~0.03 mg, Thiamine (B1) ~0.07 mg, Niacin (B3) ~0.3 mg, Pantothenic acid (B5) ~0.07 mg, Vitamin E (alpha-tocopherol) ~0.17 mg. Minerals: Potassium ~230 mg, Manganese ~0.18 mg (~8% DV), Calcium ~35 mg (bioavailability ~50–60%, higher than spinach due to low oxalate content — oxalate ~0.01 g/100 g), Phosphorus ~42 mg, Magnesium ~28 mg, Iron ~0.4 mg (non-heme form; bioavailability ~2–5%, enhanced by co-consumption with vitamin C), Zinc ~0.27 mg, Sodium ~28 mg, Copper ~0.06 mg, Selenium ~0.9 µg (can be significantly enhanced via selenium biofortification to ~10–35 µg/100 g as selenomethionine, a highly bioavailable organic form). Bioactive compounds: Glucosinolates (total ~20–90 µmol/g dry weight, dominated by sinigrin/glucoiberin/glucobrassicin — hydrolyzed by endogenous myrosinase upon tissue disruption to bioactive isothiocyanates including allyl isothiocyanate and sulforaphane analogs; cooking inactivates myrosinase but gut microbiota partially compensate); Kaempferol glycosides ~1.0–5.0 mg/100 g fresh weight; Quercetin glycosides ~0.5–2.0 mg/100 g; Anthocyanins: minimal in green varieties; Phenolic acids including caffeic acid, ferulic acid, and sinapic acid (total phenolics ~50–120 mg GAE/100 g fresh weight); S-methylcysteine sulfoxide (SMCSO) ~1–3 mg/g dry weight (sulfur compound with potential cholesterol-lowering activity); Chlorophyll a and b present in outer leaves (~10–20 mg/100 g); Lutein and zeaxanthin ~0.3–0.8 mg/100 g (carotenoids with ocular bioavailability enhanced by fat). The characteristic crinkled/savoyed leaf morphology does not significantly alter nutrient density but may affect cooking water retention. Savoy cabbage generally contains higher protein and lower fiber than smooth white cabbage, and its glucosinolate profile is intermediate between white and red cabbage varieties.

## Dosage & Preparation

No clinically studied dosage ranges for Savoy cabbage in humans have been established. Animal studies on related cabbage varieties used extract doses of 100 mg/kg body weight for [oxidative stress](/ingredients/condition/antioxidant) reduction, but human equivalent doses and standardization details were not specified. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

Savoy cabbage consumed in typical dietary amounts is generally recognized as safe, but large supplemental doses of concentrated glucosinolates or isothiocyanates may interfere with [thyroid](/ingredients/condition/hormonal) hormone synthesis by inhibiting iodine uptake, particularly in individuals with pre-existing hypothyroidism or iodine deficiency. High intake of cruciferous vegetables including savoy cabbage may potentiate the anticoagulant effect of warfarin due to its vitamin K content, necessitating consistent intake monitoring in patients on anticoagulation therapy. Individuals taking thyroid medications (e.g., levothyroxine) should consult a healthcare provider before consuming large amounts. Safety during pregnancy at dietary levels is considered acceptable, but concentrated extracts or supplements have not been adequately studied in pregnant or lactating populations.

## Scientific Research

No human clinical trials, RCTs, or meta-analyses specifically on Savoy cabbage were identified in the available research. Related cabbage variety studies showed [neuroprotective effect](/ingredients/condition/cognitive)s in SH-SY5Y human cell assays and increased stress resistance in C. elegans models (PMID: 34201067), while white/Savoy cabbage leaf extracts demonstrated antibacterial activity in preliminary in vitro tests.

## Historical & Cultural Context

No specific historical or traditional medicinal uses for Savoy cabbage in documented systems like Ayurveda or TCM were identified in the research. The broader Brassica oleracea genus has been cultivated for food since ancient times, with modern research noting chemopreventive properties from compounds like sulforaphane in related varieties.

## Synergistic Combinations

Selenium, Sulforaphane, Broccoli sprout extract, Vitamin C, [Glutathione](/ingredients/condition/detox)

## Frequently Asked Questions

### What are the main bioactive compounds in savoy cabbage?

Savoy cabbage contains glucosinolates (notably sinigrin and glucobrassicin), which break down into isothiocyanates and indole-3-carbinol via myrosinase activity. It also provides flavonoids such as kaempferol and quercetin, anthocyanins, and significant levels of vitamin C and vitamin K, all contributing to its antioxidant profile.

### Does savoy cabbage have proven antimicrobial properties?

In vitro studies have shown savoy cabbage extracts exhibit antibacterial activity against S. aureus, P. aeruginosa, and K. pneumoniae, as well as antifungal activity against Candida species, likely through isothiocyanate-mediated membrane disruption. However, these findings come exclusively from cell-culture models and have not been replicated in human clinical trials, so direct antimicrobial health claims are not yet supported.

### Can savoy cabbage protect against Parkinson's disease?

Early research using C. elegans models and related cabbage varieties suggests that Brassica-derived compounds may reduce α-synuclein aggregation, a hallmark of Parkinson's disease pathology. This evidence is highly preliminary — no human trials have tested savoy cabbage specifically for neuroprotection — and results from invertebrate models cannot be directly translated to human disease outcomes.

### Does eating savoy cabbage affect thyroid function?

Glucosinolate breakdown products, specifically thiocyanates, can competitively inhibit iodine uptake by the thyroid gland, potentially impairing thyroid hormone synthesis in individuals with iodine deficiency or existing hypothyroidism. Cooking savoy cabbage largely deactivates myrosinase, substantially reducing the goitrogenic effect, and typical dietary consumption poses minimal risk for people with adequate iodine intake.

### Does savoy cabbage interact with warfarin or blood thinners?

Savoy cabbage is a source of vitamin K1 (phylloquinone), which plays a direct role in the coagulation cascade and can reduce the anticoagulant efficacy of warfarin (a vitamin K antagonist). Patients on warfarin therapy should maintain a consistent, moderate intake of cruciferous vegetables rather than eliminating them, and should inform their prescribing physician of any significant dietary changes to allow INR monitoring and dose adjustment.

### Can savoy cabbage help improve digestive health and gut microbiome balance?

Savoy cabbage contains soluble fiber and prebiotic compounds that may promote beneficial gut bacteria growth, though most evidence comes from animal studies and in vitro research. The fermented form of savoy cabbage (sauerkraut) may provide additional probiotics that support digestive function, but human clinical trials specifically measuring microbiome changes are limited. Including savoy cabbage in a balanced diet with diverse fiber sources supports overall digestive health through well-established nutritional mechanisms.

### How does the selenium content in savoy cabbage compare to other cruciferous vegetables?

Savoy cabbage contains bioavailable selenium, though selenium levels vary significantly based on soil selenium content where it is grown. Among common cruciferous vegetables, selenium content in savoy cabbage is moderate—higher than green cabbage but typically lower than Brussels sprouts or broccoli. Geographic origin and agricultural practices have the greatest impact on final selenium concentrations in fresh produce.

### Is raw savoy cabbage more beneficial than cooked savoy cabbage for health purposes?

Raw savoy cabbage retains higher levels of heat-sensitive compounds like vitamin C and some phytonutrients, while cooking may reduce bioavailability of certain sulfur compounds but may enhance others through chemical modification. Cooking increases the digestibility of fiber and some minerals by breaking down cell walls, making them more readily absorbed. Both raw and cooked forms offer health benefits, and including both in your diet maximizes exposure to different nutritional profiles.

---

*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
*License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*