Vegetable · Squash

Zucchini

Health
ScoreA+

Zucchini is a low-calorie, water-rich summer squash providing vitamin C, potassium, and fiber with minimal metabolic burden—ideal for weight management and sustained energy in longevity-focused diets.

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Why Zucchini scores 91

Nutrient density31

Protein quality11

Fiber content10

Healthy fats5

Bioactive compounds12

Glycemic impact10

Top nutrients

% Daily Value per ½ cup (85 g)

Vitamin C 17%Vitamin B6 8.0%Manganese 6.6%Riboflavin 6.1%Folate 5.1%

Nutrition

per_100g

Calories

1.2g

Protein

3.1g

Carbs

0.3g

Fat

Fiber

Health benefits

Blood pressure regulation and cardiovascular support

strong evidence

Potassium content (261 mg/100g) promotes sodium-potassium balance, reducing vascular tension and supporting healthy endothelial function

Antioxidant defense and collagen synthesis

strong evidence

Vitamin C (17.9 mg/100g) neutralizes reactive oxygen species and stabilizes prolyl and lysyl hydroxylase for collagen cross-linking

Gut microbiota support and metabolic health

moderate evidence

Soluble fiber and polysaccharides function as prebiotics, nourishing beneficial bacteria and improving short-chain fatty acid production

Ocular and cognitive health preservation

moderate evidence

Lutein and zeaxanthin in skin accumulate in the macula and hippocampus, filtering blue light and protecting neuronal function

Weight management and metabolic flexibility

moderate evidence

Extreme caloric density (17 kcal/100g) with satiety-inducing fiber allows high-volume consumption without metabolic burden

Pairs well with

·Pair with olive oil (2-3 tsp per serving) because fat-soluble carotenoids (lutein, zeaxanthin, β-carotene) in skin require lipid co-ingestion for optimal absorption
·Combine with sulfur-rich alliums (garlic, onions) to enhance phase II detoxification enzyme activation through synergistic polyphenol and organosulfur interactions
·Pair with tomatoes (both containing lycopene) because lycopene bioavailability increases 3-4x when combined with cooked tomatoes and fat
·Combine with herbs high in phenolics (basil, oregano, thyme) to amplify antioxidant capacity and extend polyphenol half-life in circulation
·Pair with legumes (lentils, chickpeas) to create a complete amino acid profile and enhance fiber fermentation for microbiota diversity

Practical tips

·Best timing: Zucchini's low glycemic load and negligible fructose content make it suitable for any meal or eating window. Evening consumption provides prebiotic fiber for overnight microbiota fermentation, while midday inclusion supports sustained satiety without energy crashes.
·Consume skin-on to maximize lutein, zeaxanthin, and fiber intake; light steaming (3-4 min) preserves heat-sensitive vitamin C better than extended cooking
·Select smaller, firmer zucchini (6-8 inches) as larger specimens accumulate more seeds and develop watery, less nutrient-dense flesh
·Store at 5°C (41°F) in ventilated containers for up to 7 days; plastic wrapping promotes mold growth by trapping moisture
·Blanch and freeze in portions to preserve enzymatic activity better than raw storage; frozen zucchini retains ~90% of original vitamin C after 3 months
·Spiral or ribbon raw zucchini to create low-glycemic pasta alternatives; combine with protein and fat to prevent rapid glucose spikes