Broccoli glycemic index
Broccoli has no measurable glycemic index: a 80 g serving (1 side portion) has only 3.1 g of available carbohydrate, so its glycemic load is about 0 and it barely raises blood sugar on its own.
Also known as: broccoli florets
- Serving80 g
- Available carbs3.1 g
- Fiber2.6 g
- Sugars1.1 g
- Protein1.9 g
- Calories28 kcal
Serving: 1 side portion.
What to know
Broccoli and other non-starchy vegetables are too low in carbohydrate to test for GI. Fill half your plate with them to lower the glycemic load of the whole meal.
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Frequently asked questions
Does broccoli have a glycemic index?
Not a measurable one. GI can only be tested in foods with enough carbohydrate: the test needs a 25 or 50 g carbohydrate portion. Broccoli has 3.9 g per 100 g, so its direct effect on blood sugar is minimal and its glycemic load is about 0.
Does broccoli raise blood sugar?
Barely, on its own. What matters more is what you eat it with: bread, rice, potatoes, sauces or sugary drinks. Pairing carbohydrate foods with protein, fat or fiber tends to soften the rise.
How many carbs are in broccoli?
A 80 g serving has about 5.7 g of total carbohydrate, including 2.6 g of fiber, leaving 3.1 g of available carbohydrate (the part that raises blood sugar). Per 100 g: 7.2 g of carbohydrate.
Nutrition facts
| per 100 g | Serving (80 g) | |
|---|---|---|
| Calories | 35 kcal | 28 kcal |
| Carbohydrates | 7.2 g | 5.7 g |
| Available carbs | 3.9 g | 3.1 g |
| Fiber | 3.3 g | 2.6 g |
| Sugars | 1.4 g | 1.1 g |
| Protein | 2.4 g | 1.9 g |
| Fat | 0.4 g | 0.3 g |
Source: USDA FoodData Central, Broccoli, cooked, boiled, drained, without salt (SR Legacy, FDC 169967). Available carbohydrate = total carbohydrate minus fiber.
Sources: Atkinson FS, Brand-Miller JC, Foster-Powell K, Buyken AE, Goletzke J. International tables of glycemic index and glycemic load values 2021: a systematic review. Am J Clin Nutr. 2021;114(5):1625–1632. USDA FoodData Central. How we calculate each value: Methodology & sources.
Data last reviewed 2026-09-29.