Kumquat

Nutrition per ~140 g · 1 medium piece

13.2 g net carbs after fiber.

Vitamins

Minerals & other

Bioactives estimated

Representative amounts for this food, not measured for this item. Real content varies widely by variety, ripeness and storage.

What drives the score weighted inputs

These are the scored components, not a sum: the published score also reflects normalisation across the catalog, so the parts above will not add to 95.

What it feeds primary sources only

Systems

Pathways

Overview

Kumquats (Fortunella species) are native to East Asia and have gained popularity globally as a functional food. Unlike most citrus, kumquats are eaten whole—skin and flesh together—maximizing nutrient intake. The edible peel contains significantly higher concentrations of flavonoids and essential oils compared to the flesh, making kumquats uniquely bioactive. Per 100g, kumquats provide 43.9 mg of vitamin C (73% DV), supporting collagen synthesis and immune resilience. The 6.5g fiber content promotes satiety and prebiotic fermentation, while the 186 mg potassium supports cardiovascular regulation. Kumquats contain hesperidin and other polymethoxylated flavonoids—compounds with demonstrated anti-inflammatory and antioxidant properties in cell and animal studies. The low glycemic index (estimated ~38) and sugar content relative to fiber makes kumquats suitable for metabolic health. Their volatile oils (limonene, pinene) have documented antimicrobial and potential neuroprotective effects in preliminary research. For longevity-focused nutrition, kumquats represent a high-nutrient-density, low-calorie option addressing multiple aging-related pathways including oxidative stress, inflammation, and glucose regulation.

Health benefits 5

Pairs 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

In the kitchen

• 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

When to eat it midday

Midday consumption aligns with natural circadian digestive enzyme activity and allows vitamin C absorption to support afternoon energy and focus. Consuming whole kumquats with meals enhances flavonoid bioavailability through fat co-ingestion.

Fasting-compatible

Best avoided

• late evening before bed (citric acid may affect sleep; minimal issue if consumed 3+ hours before sleep)

Kumquats are compatible with fasting due to negligible caloric impact (71 kcal/100g), though consuming with food optimizes micronutrient absorption. Safe for most medication regimens; no documented drug interactions.