Tuna glycemic index
Tuna has no measurable glycemic index: a 100 g serving (1 portion) has only 0 g of available carbohydrate, so its glycemic load is about 0 and it barely raises blood sugar on its own.
Also known as: canned tuna, tuna fish
- Serving100 g
- Available carbs0 g
- Fiber0 g
- Sugars0 g
- Protein19 g
- Calories86 kcal
Serving: 1 portion.
What to know
Tuna has no carbohydrate and no GI. Tuna on rice cakes or crackers lowers the effect of the high-GI base.
Know the glycemic index of any meal from a photo
Tables work for single foods. The app estimates the GI and glycemic load of your whole plate, with real portions.
- Scan your plate or just describe it
- GI, glycemic load, calories and macros
- An AI nutritionist that knows your meals
Frequently asked questions
Does tuna 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. Tuna has 0 g per 100 g, so its direct effect on blood sugar is minimal and its glycemic load is about 0.
Does tuna 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 tuna?
A 100 g serving has about 0 g of total carbohydrate, including 0 g of fiber, leaving 0 g of available carbohydrate (the part that raises blood sugar). Per 100 g: 0 g of carbohydrate.
Nutrition facts
| per 100 g | Serving (100 g) | |
|---|---|---|
| Calories | 86 kcal | 86 kcal |
| Carbohydrates | 0 g | 0 g |
| Available carbs | 0 g | 0 g |
| Fiber | 0 g | 0 g |
| Sugars | 0 g | 0 g |
| Protein | 19 g | 19 g |
| Fat | 1 g | 1 g |
Source: USDA FoodData Central, Fish, tuna, light, canned in water, drained solids (Includes foods for USDA's Food Distribution Program) (SR Legacy, FDC 173709). 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.