Vegetable

Radicchio

Health
ScoreA+

Radicchio is a bitter cruciferous vegetable rich in polyphenols and vitamin K, offering anti-inflammatory and antioxidant properties with minimal calories.

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Why Radicchio scores 95

Nutrient density35

Protein quality10

Fiber content8

Healthy fats5

Bioactive compounds13

Glycemic impact10

Top nutrients

% Daily Value per ½ cup (85 g)

Vitamin K 181%Copper 32%Vitamin B6 13%Vitamin E 13%Folate 13%

Nutrition

per_100g

Calories

1.4g

Protein

4.5g

Carbs

0.3g

Fat

0.9g

Fiber

Health benefits

Enhanced bone health and vascular calcification prevention

strong evidence

Vitamin K activates osteocalcin and matrix Gla protein, which direct calcium to bone tissue and away from arterial walls, supporting both skeletal strength and cardiovascular health

Reduced oxidative stress and systemic inflammation

moderate evidence

Anthocyanins and phenolic acids neutralize free radicals and inhibit pro-inflammatory signaling pathways, particularly NF-κB activation

Improved insulin sensitivity and metabolic health

moderate evidence

Inulin (prebiotic fiber) and polyphenols modulate gut microbiota composition and enhance insulin receptor signaling while reducing hepatic glucose production

Enhanced detoxification capacity

moderate evidence

Glucosinolates and their metabolite sulforaphane upregulate Phase II detoxification enzymes including glutathione S-transferase and NAD(P)H quinone oxidoreductase

Improved digestive and microbiome health

moderate evidence

Inulin acts as a prebiotic, selectively feeding beneficial Bifidobacterium and Faecalibacterium species while bitter compounds stimulate bile and digestive secretions

Pairs well with

·Pair with olive oil because fat-soluble vitamin K and carotenoid absorption require lipids for micelle formation and intestinal uptake
·Pair with cruciferous vegetables (broccoli, Brussels sprouts) because combined glucosinolate content provides synergistic Phase II enzyme induction
·Pair with citrus fruits because vitamin C enhances iron bioavailability and stabilizes anthocyanins in the acidic digestive environment
·Pair with fermented foods (kimchi, sauerkraut) because combined polyphenols and probiotics optimize microbiome diversity and prebiotic effect

Practical tips

·Best timing: midday
·Select radicchio with firm, crisp leaves and deep burgundy coloration; avoid wilted or yellowing specimens, which indicate nutrient degradation
·Store unwrapped in the refrigerator's crisper drawer for up to 2 weeks; the cold preserves anthocyanin integrity and inhibits enzymatic browning
·Consume raw or lightly cooked (sautéed 2-3 minutes) to preserve heat-sensitive polyphenols; longer cooking reduces antioxidant potency by 15-25%
·Dress warm radicchio immediately with olive oil to enhance fat-soluble vitamin absorption and increase palatability of bitter compounds
·Rotate with other bitter greens (endive, escarole) to diversify polyphenol profiles and prevent taste fatigue while maximizing phytochemical diversity