Quinoa Glycemic Index: Is It Low? GI, GL & Rice Compared

By Dr. Rachel Kim · Published October 6, 2026 · 6 min read

The quinoa glycemic index is about 53, which places it just inside the low-GI category (55 or below). That means a serving of cooked quinoa raises blood sugar more gently than white rice, couscous or white bread. Quinoa is not a free pass, though: a full cup still carries about 34 g of net carbs, and its glycemic load lands in the medium range.

Below you'll find the exact GI and GL numbers, how quinoa compares with other grains, and what changes its effect on your blood sugar. Logging your portions with Caloria, the AI calorie tracker, shows you how many carbs that bowl actually holds.

What Is the Glycemic Index of Quinoa?

Cooked quinoa scores between 50 and 54 on the glycemic index, with an average of about 53. The International Tables of Glycemic Index 2021, the standard reference compiled by the University of Sydney, list boiled white quinoa at about 50 and boiled red quinoa at about 54.

The GI scale ranks carbohydrate foods by how fast they raise blood glucose compared with pure glucose (GI 100):

• Low GI: 55 or less
• Medium GI: 56–69
• High GI: 70 or more

Some studies measure even lower values. A 2024 study of Bolivian Quinoa Real, tested to the ISO standard, found GIs of 28 for black, 33 for white and 36 for red quinoa. Variety, growing region and cooking all shift the number, so treat 53 as a fair average rather than a fixed figure.

Why Quinoa Has a Low GI

Three things slow how quickly quinoa's starch turns into blood sugar:

• Fiber — about 5 g per cooked cup, which slows digestion and glucose absorption.
• Protein — about 8 g per cup, nearly double what rice provides. Protein blunts the post-meal glucose rise.
• Intact grain structure — the whole seed, eaten unprocessed, takes longer to break down than flour-based foods.

Quinoa Glycemic Load: The Number That Matters More

Quinoa's glycemic load is about 16 per 150 g serving and about 18 per cup, which is medium. Glycemic load (GL) multiplies a food's GI by the net carbs in a real portion, so it reflects the impact of what's actually on your plate. A GL of 10 or less is low, 11–19 is medium, and 20 or more is high.

That is why a "low-GI" label can mislead. A heaping two-cup bowl of quinoa has a GL near 36, higher than a single cup of white rice. If you're new to the difference between total and net carbs, our guide to net carbs vs total carbs explains how fiber is subtracted.

Quinoa vs Rice and Other Grains

Quinoa has a lower GI and GL than white rice, brown rice and couscous, but it isn't the lowest grain available. Pearl barley and bulgur beat it on both measures. The table compares one cooked cup of each, using GI values from the international tables and nutrition data from the USDA.

Swapping a cup of white rice for quinoa cuts the glycemic load by almost half and doubles the protein. For a closer look at the rice side of this comparison, see our rice nutrition facts breakdown, including why basmati is the lowest-GI rice.

Quinoa's real advantage over barley and bulgur is that it's gluten-free. An Italian study of gluten-free foods found that quinoa produced a slightly lower glycemic response than gluten-free pasta and bread, along with lower triglycerides. That makes it one of the better staple carbs for people with celiac disease.

What Changes Quinoa's Effect on Blood Sugar

The GI of 53 applies to plain, boiled whole quinoa. Several everyday choices can push your actual response up or down:

• Portion size — the biggest factor. Doubling the serving doubles the glycemic load.
• Processing — quinoa flour behaves very differently from the whole grain. In lab testing, a 100% quinoa bread had a predicted GI of 95, higher than buckwheat, teff or oat breads. Puffed quinoa and quinoa flakes are likely to digest faster than whole cooked grains, too.
• Cooking time — overcooked, mushy quinoa breaks down more easily. Cook it until the grains are tender but separate, about 15 minutes.
• Cooling — chilling cooked quinoa for a salad may increase resistant starch slightly, though the effect is smaller than with rice or potatoes.
• What you eat with it — protein, fat, non-starchy vegetables and vinegar-based dressings all slow the meal's overall glucose rise.

Is Quinoa Good for Diabetics?

Quinoa is one of the better carbohydrate choices for people with diabetes or insulin resistance, as long as the portion fits your carb budget. In carb-counting terms, about ⅓ cup of cooked quinoa equals one 15 g carbohydrate serving, so a ½- to 1-cup portion covers roughly 1½ to 3 servings.

Quinoa isn't low-carb, so it doesn't fit a strict keto plan. It fits well in a balanced plate approach, and it shows up in our diabetic meal plan and insulin resistance diet as a rice and pasta replacement. Build the meal like this:

For more ways to build steady-energy meals, our low glycemic index foods list ranks 50 foods by GI with calories per serving.

Frequently Asked Questions

Is quinoa a carb or a protein?

Quinoa is mainly a carbohydrate: about 70% of its calories come from carbs. It is unusually high in protein for a grain, however, at 8 g per cup, and it supplies all nine essential amino acids.

Is red or black quinoa lower GI than white?

The differences are small and inconsistent between studies. The international tables list white quinoa slightly lower than red, while the Bolivian study found black quinoa lowest. Pick the color you enjoy and focus on portion size.

Can you eat quinoa on a low-carb diet?

In small amounts on a moderate low-carb diet, yes. At about 34 g of net carbs per cup, quinoa doesn't fit a strict keto limit of 20–50 g a day.

Start Tracking Smarter

Quinoa's low glycemic index is a real advantage over rice and couscous, but the portion on your plate decides how your blood sugar actually responds. Knowing how much you're eating is the simplest way to get the benefit.

Download Caloria to snap a photo of your quinoa bowl and get instant calories, carbs and macros — no weighing or manual entry.

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