Kumquat Glycemic Index
Low GI · The honest verdict
Gentle on blood sugar
Glycemic index
32–44
reported range
Glycemic load
2
Low GL
This food's glycemic index is 32–44, which is Low GI.
Kumquats are an unusually fiber-dense citrus fruit; eating the peel means a 5-fruit serving delivers over 6 g of fiber alongside only about 9 g of net carbs. This produces a very gentle blood sugar response. This is general nutrition information, not medical advice; people with diabetes should confirm portions with their care team.
GI numbers vary by source, ripeness, and how a food is prepared. This is general nutrition information — not medical advice. If you manage diabetes, confirm specifics with your care team.
Key facts
Kumquats are unique among citrus — the peel is sweet and edible, while the pulp is tart, and eating the whole fruit boosts fiber intake significantly.
Five whole kumquats (about 95 g) provide over 6 g of dietary fiber — more than most other citrus fruits of comparable serving size.
A glycemic load of 10 or below per serving is classified as low; kumquats score approximately 2 for a 5-fruit serving.
What's actually inside
Per 100 g, with your typical serving noted as 5 kumquats (95 g), whole with peel. The carb family is what moves blood sugar — fiber is the number that softens the spike.
Total carbs
15.9g
Net carbs
9.4g
total carbs minus fiber
Fiber
6.5g
slows the glucose rise
- Sugars
- 9.4g
- Protein
- 1.9g
- Calories
- 71kcal
Notable nutrients
- Vitamin C47 mg
- Calcium62 mg
- Vitamin A293 IU
- Potassium195 mg
- Fiber (from peel)6.5 g
Is it a smart choice for blood sugar?
GI is only half the story — portion (glycemic load) and what you eat it with decide the real-world effect. Here's the honest read.
The verdict
Very diabetes-friendly — one of the best citrus choices for blood sugar
Kumquats are an unusually fiber-dense citrus fruit; eating the peel means a 5-fruit serving delivers over 6 g of fiber alongside only about 9 g of net carbs. This produces a very gentle blood sugar response. This is general nutrition information, not medical advice; people with diabetes should confirm portions with their care team.
Portion guidance
Five whole kumquats is a typical snack serving — about 95 g — with a GL of roughly 2, which is extremely low. Even doubling to 10 fruits keeps GL in the low range. The main blood sugar consideration is if you skip the peel and eat only the sweet-tart pulp, which removes a significant chunk of the fiber.
This is general nutrition information, not personal medical advice. Blood sugar responses are individual — if you have diabetes or prediabetes, your care team can tell you how this fits your plan.
How to keep the spike small
The same food can land differently depending on how it's cooked and what it's eaten with. Use these levers to your advantage.
Eating whole with peel
Lowers the spikeThe kumquat peel is edible and fiber-rich. Eating the whole fruit dramatically increases fiber intake compared to peeled citrus, which slows sugar absorption and lowers the effective glycemic response.
Removing the peel
Raises GIThe pulp alone is sweeter and lower in fiber than the whole fruit. Without the peel's fiber, sugar absorption speeds up slightly.
Making jam or marmalade
Raises GICooking with added sugar concentrates calories and carbs dramatically. Kumquat preserves lose the fiber benefits and add substantial sugar — not representative of the whole fresh fruit.
Pairing with protein or fat
Lowers the spikeAdding nuts, cheese, or yogurt alongside slows gastric emptying and smooths the modest glucose rise further.
Pairing tip
Eat kumquats whole — peel and all — for maximum fiber benefit. They are excellent as a palate cleanser between courses or sliced into salads. Their tartness pairs well with fatty cheeses (brie, ricotta) and nuts, both of which blunt any blood sugar response. Avoid candied or preserved preparations, which add large amounts of sugar.
Why GI numbers vary
Formal GI testing data specific to kumquats is very limited. Estimates are extrapolated from related citrus studies and the food's known macronutrient profile — particularly its exceptional fiber content from the edible peel. Published references for kumquats specifically are sparse; the 32–44 range reflects our best estimate based on comparable low-GI citrus fruits. Individual responses will vary by ripeness and how much peel is consumed.
Not medical advice. This page is general nutrition information about Kumquat. It isn't a diagnosis or a treatment plan. If you have diabetes, prediabetes, or another condition affecting blood sugar, confirm any dietary decisions with your doctor or care team.
❓Frequently Asked Questions
Kumquats are a low-GI fruit — estimated in the 32–44 range based on citrus GI data and kumquat's high fiber content. Formal GI testing specific to kumquats is limited, so this is an honest estimate rather than a precisely studied value. The glycemic load per serving is very low (around 2 for 5 fruits) because of the small carb load per fruit and the fiber in the edible peel.
Yes — kumquats are among the better citrus options for blood sugar management. Their edible peel is unusually high in fiber, which slows sugar absorption. A snack-size serving of 5 whole kumquats has roughly 9 g of net carbs and over 6 g of fiber, producing a very gentle glucose response. As always, people with diabetes should check portions with their care team and monitor their own response.
Kumquats are unique among citrus in that the peel is the sweet part and the flesh is tart — and the peel is typically eaten. This peel is rich in dietary fiber and flavonoids. Eating the whole fruit rather than just the pulp nearly doubles the fiber intake per serving, which directly slows the digestion and absorption of the fruit's sugars.
Kumquats are among the lower-carb citrus options — roughly 2 g of net carbs per fruit. Five whole kumquats amount to about 9 g of net carbs, which fits comfortably into most moderate low-carb eating plans. Even strict low-carb dieters can usually enjoy a small handful. Check your specific daily carb target to see how many fit.
Yes, per gram. Because kumquats are eaten whole with the peel, and the peel is fiber-dense, they deliver substantially more fiber per 100 g than peeled oranges. A 100 g serving of kumquats provides about 6.5 g of fiber compared to roughly 2.4 g in a 100 g orange segment. This fiber advantage is a key reason for their low glycemic impact.
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Reviewed by
Curex Editorial TeamReviewed for accuracy
Last reviewed July 2026