Fruit

Kumquat

90Health
Score

A+

Kumquats are small citrus fruits with edible sweet skin and tart flesh, delivering high vitamin C and fiber with minimal calories. They are nutrient-dense whole fruits ideal for supporting immune function and digestive health.

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Why Kumquat scores 90

Nutrient density31

Protein quality7

Fiber content10

Healthy fats5

Bioactive compounds11

Glycemic impact10

Top nutrients

Vitamin C48.8Vitamin B612.2Copper10.6Riboflavin6.9Manganese5.9

Nutrition

per_100g

Calories

1.9g

Protein

15.9g

Carbs

0.9g

Fat

6.5g

Fiber

Health benefits

Enhanced immune function and collagen synthesis

strong evidence

High vitamin C content (43.9 mg/100g) acts as a cofactor for prolyl hydroxylase, stabilizing collagen triple helix formation and supporting neutrophil function in immune response

Reduced oxidative stress and systemic inflammation

moderate evidence

Flavonoids (hesperidin, polymethoxylated flavonoids) in kumquat skin inhibit NF-κB signaling and upregulate endogenous antioxidant enzymes like superoxide dismutase

Improved digestive health and microbiota diversity

moderate evidence

6.5g fiber per 100g feeds beneficial bacteria and increases short-chain fatty acid production, supporting intestinal barrier integrity and reducing pathogenic bloom

Cardiovascular regulation through potassium

strong evidence

186 mg potassium activates Na+/K+-ATPase, regulating vascular tone, reducing blood pressure, and supporting electrolyte balance

Potential antimicrobial and neuroprotective activity

emerging evidence

Limonene and other monoterpenes in kumquat essential oil demonstrate broad-spectrum antimicrobial effects and preliminary evidence of modulating neuroinflammation markers

Pairs well with

·Pair with fatty fish (salmon, sardines) because vitamin C enhances non-heme iron absorption from fish and supports collagen cross-linking with omega-3 EPA/DHA
·Combine with nuts (almonds, walnuts) because fat-soluble flavonoid absorption is enhanced by dietary lipids, increasing bioavailability of hesperidin and polymethoxylated flavonoids
·Mix with leafy greens (spinach, arugula) in salads because kumquat's acidity (citric acid) helps solubilize calcium and magnesium, improving mineral bioavailability
·Pair with turmeric or ginger because combined polyphenols (curcumin, gingerol, flavonoids) synergistically inhibit inflammatory pathways through complementary mechanisms

Practical tips

·Best timing: midday
·Eat kumquats whole (skin and flesh) since the peel contains 3-4x higher flavonoid concentrations than the flesh; washing thoroughly removes pesticide residue
·Select firm, glossy kumquats without soft spots; store at room temperature for 3-5 days or refrigerate up to 2 weeks in a breathable container to maintain volatile oil content
·Add kumquats to morning tea or warm water to preserve heat-sensitive vitamin C; alternatively, blend into smoothies with fat source for enhanced flavonoid absorption
·Consume 4-6 kumquats (approximately 80-120g) as a snack or dessert to achieve meaningful nutrient dose while keeping calories low and supporting satiety
·For those with sensitive teeth or reflux, consume kumquats with meals rather than on empty stomach to buffer citric acid exposure

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