Shallot Glycemic Index
Low GI · The honest verdict
Gentle on blood sugar
Glycemic index
15
per source
Glycemic load
2
Low GL
This food's glycemic index is 15, which is Low GI.
Shallots are used in small culinary amounts and contain very few digestible carbohydrates per serving. Their prebiotic fiber and flavonoid content may offer additional metabolic benefits, though GI studies specific to shallots are limited. This is general nutrition information, not medical advice; people with diabetes should consult 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
Shallots, like onions and garlic, contain fructooligosaccharides — prebiotic fibers that resist digestion and keep the glycemic index very low.
A two-tablespoon serving of raw shallot contains under 3 grams of total carbohydrate — a negligible glycemic contribution in any dish.
Onions — the closest relative to shallots — are documented at a GI of approximately 10 in the University of Sydney GI database, supporting a similar estimate for shallots.
What's actually inside
Per 100 g, with your typical serving noted as 2 tablespoons chopped (20 g), raw. The carb family is what moves blood sugar — fiber is the number that softens the spike.
Total carbs
3.3g
Net carbs
2.8g
total carbs minus fiber
Fiber
0.5g
slows the glucose rise
- Sugars
- 1.4g
- Protein
- 0.5g
- Calories
- 14kcal
Notable nutrients
- Vitamin C2 mg
- Folate9 mcg
- Potassium100 mg
- Quercetin (flavonoid)~12 mg
- Allicin precursorspresent
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
Blood-sugar friendly — low GI, low carb in typical servings
Shallots are used in small culinary amounts and contain very few digestible carbohydrates per serving. Their prebiotic fiber and flavonoid content may offer additional metabolic benefits, though GI studies specific to shallots are limited. This is general nutrition information, not medical advice; people with diabetes should consult their care team.
Portion guidance
A typical 1–2 tablespoon serving of shallot (as used in cooking) contributes fewer than 3 grams of carbs and a glycemic load under 2 — essentially negligible. Even eating a whole shallot raw in a salad (about 30–40 g) produces only 4–5 grams of net carbs and a very low glycemic load.
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.
Raw in salads or dressings
Lowers the spikeRaw shallots retain all their prebiotic fiber and pungent compounds intact, yielding the lowest possible glycemic response — which is already very low.
Caramelizing or long-cooking
Raises GIExtended heat breaks down fructooligosaccharides into simpler sugars and concentrates them as water evaporates. Caramelized shallots are sweeter and have a modestly higher glycemic impact per gram — still low overall in realistic culinary portions.
Light sauteing in oil
Little effectBrief cooking in oil softens shallots without significantly altering their carbohydrate structure. The added fat also slows gastric emptying, keeping glucose absorption gradual.
Pairing tip
Shallots are almost always used as a flavor enhancer rather than a main ingredient, so their glycemic contribution is naturally small. Raw shallot vinaigrettes with olive oil are ideal — the fat and acidity together create a very low-glycemic dressing. Use them liberally in cooking without blood-sugar concern.
Why GI numbers vary
Formal GI studies on shallots specifically are not available in major published databases. The approximate value of 15 is consistent with other allium vegetables (onions are documented at ~10–15 in the University of Sydney database) and with shallots' similar carbohydrate composition — mostly fructose and fructooligosaccharides rather than glucose-spiking starches. We report this as a well-reasoned estimate aligned with the broader allium family, not a single lab-verified number.
Not medical advice. This page is general nutrition information about Shallot. 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
Shallots are estimated to have a glycemic index of approximately 15, placing them in the low-GI category (55 and below). Dedicated GI studies on shallots are scarce, but their nutritional profile — similar to onions — and their carbohydrate composition (mostly fructose and prebiotic fructooligosaccharides) strongly support a very low GI. In typical culinary portions, shallots contribute almost no glycemic load.
Yes — shallots are an excellent choice for blood-sugar management. They are used in small amounts, have very few digestible carbohydrates per serving, and their fructooligosaccharides act as prebiotic fiber that resists rapid digestion. Their quercetin and organosulfur compounds are also being studied for potential metabolic health benefits. No food can promise specific blood-sugar outcomes, and individuals with diabetes should confirm choices with their care team.
Minimally, if at all. A typical 1–2 tablespoon serving contributes fewer than 3 grams of net carbs and a glycemic load under 2 — too small to cause a meaningful blood-sugar rise in most people. Even eating a whole raw shallot provides only about 5 grams of net carbs. The natural sweetness of shallots comes largely from fructose and prebiotic sugars that are absorbed more slowly than glucose.
Shallots and onions are both very low-GI allium vegetables with similar carbohydrate profiles. Onions have a well-documented GI of around 10; shallots are estimated similarly at around 15. Shallots tend to be sweeter and are used in smaller quantities, so the practical difference in glycemic impact per dish is negligible. Both are excellent blood-sugar-friendly flavor bases in cooking.
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Reviewed by
Curex Editorial TeamReviewed for accuracy
Last reviewed July 2026