Kohlrabi is a cruciferous vegetable with a mild, slightly sweet flavor and exceptional vitamin C content. Its low calorie density combined with high fiber and potassium makes it valuable for cardiovascular and metabolic health.
MethylationAntioxidantATP / MitoBoneThyroidCollagenNeurotransmitterDetoxGlucoseHematopoiesisLipidsGut MicrobiomeMembranesClottingHPA AxisGlycolysisβ-OxidationKetogenesisNAD⁺mTORAMPKUrea CycleDopamineSerotoninSteroidogenesisVitamin D ActivationInsulin Signaling
Overview
Kohlrabi (Brassica oleracea var. gongylodes) is a cruciferous vegetable native to the Mediterranean and Central Asia, though widely cultivated in Europe and Asia. The edible bulb develops above ground, distinguishing it from root vegetables. Despite its mild flavor, kohlrabi delivers impressive micronutrient density: one 100g serving provides 62mg of vitamin C (103% DV), substantial potassium (350mg for cardiovascular support), and 3.6g of fiber for gut health. As a cruciferous vegetable, kohlrabi contains glucosinolates—sulfur compounds that metabolize into isothiocyanates with potential anti-inflammatory and anticarcinogenic properties. Its extremely low calorie profile (27 kcal/100g) with meaningful satiety-promoting fiber makes it particularly valuable for weight management and metabolic health. The combination of vitamin C, potassium, and choline supports endothelial function, arterial elasticity, and cognitive health—key factors in longevity pathways. Kohlrabi's glucosinolates are best preserved through minimal cooking (raw or lightly steamed), making it an efficient way to obtain these bioactive compounds compared to more pungent brassicas.
Health benefits 5
Supports cardiovascular health through potassium and antioxidant contentstrong
Potassium (350mg/100g) regulates blood pressure and reduces vascular stiffness; vitamin C (62mg/100g) protects endothelial cells from oxidative stress and supports arterial elasticity
Reduces inflammation and supports detoxification via glucosinolatesmoderate
Glucosinolates are metabolized into isothiocyanates, which activate phase II detoxification enzymes (glutathione S-transferase) and inhibit NF-κB inflammatory pathways
Promotes healthy weight management and metabolic functionmoderate
Extremely low energy density (27 kcal/100g) combined with 3.6g fiber per 100g increases satiety and stabilizes blood glucose while maintaining nutrient density
Supports cognitive function through choline and B vitaminsmoderate
Choline (12.3mg/100g) is a precursor to acetylcholine and phosphatidylcholine, essential for neuronal membrane integrity and synaptic plasticity
High vitamin C content optimizes collagen synthesis and serves as a reducing agent for intracellular antioxidants; glucosinolates upregulate expression of antioxidant enzymes
Pairs with
Pair with olive oil-based dressing because fat-soluble vitamin absorption is enhanced, and olive oil's polyphenols synergize with kohlrabi's glucosinolates for additive anti-inflammatory effects
Combine with garlic or onions because sulfur compounds in alliums enhance glucosinolate bioconversion to active isothiocyanates through shared enzymatic pathways
Pair with citrus (lemon juice) because vitamin C from citrus enhances iron bioavailability from kohlrabi (if consumed with iron-rich foods) and preserves glucosinolates through acidic preservation
Eat with fermented foods (sauerkraut, kimchi) because the low FODMAP content of kohlrabi pairs well with probiotic foods, and raw preparation preserves myrosinase enzymes needed for glucosinolate conversion
In the kitchen
Consume raw or lightly steamed (2-3 minutes) to preserve heat-sensitive vitamin C and myrosinase enzyme activity, which is critical for converting glucosinolates to bioactive isothiocyanates
Select firm, unblemished bulbs 2-3 inches in diameter (smaller specimens are typically more tender); store in refrigerator crisper drawer for up to 2 weeks with leaves attached for moisture retention
Include both the bulb and tender leaves in meals—leaves contain higher glucosinolate concentrations and can be prepared as you would collard greens or chard
Chop or cut kohlrabi immediately before eating when consuming raw to maximize myrosinase exposure to glucosinolates; allow 5-10 minutes contact before consuming to optimize conversion
When to eat it anytime
Kohlrabi's low glycemic impact, high fiber, and abundant micronutrients make it suitable at any meal. Consuming it with protein and fat at lunch or dinner optimizes satiety and nutrient absorption; its vitamin C content supports afternoon antioxidant status.
Fasting-compatible
Can be consumed during fasting windows as its minimal calories and high micronutrient density provide nutritional benefit without substantially breaking a fast, though maximum glucosinolate bioavailability occurs with meals containing fat for absorption.