Muffin Glycemic Index
Medium GI · The honest verdict
A moderate blood-sugar rise
Glycemic index
55–70
reported range
Glycemic load
17
Medium GL
This food's glycemic index is 55–70, which is Medium GI.
Muffins are typically made with refined flour and sugar, giving them a medium to high glycemic impact. A standard medium muffin contains over 50 g of carbs and 25 g of sugar, which can raise blood glucose significantly. Whole-grain or bran muffins with less added sugar are lower-GI alternatives, but portion size still matters. This is general nutrition information, not medical advice — people with diabetes should confirm serving guidance 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
Muffin GI ranges from 55 to 70 — a baked good with medium to high blood sugar impact depending on recipe.
One medium commercially prepared muffin (113 g) contains about 54 g total carbs and 25 g sugar.
Glycemic load of 11–19 is classified as medium — a standard muffin has a GL of about 17.
What's actually inside
Per 100 g, with your typical serving noted as 1 medium muffin (113 g), commercially prepared. The carb family is what moves blood sugar — fiber is the number that softens the spike.
Total carbs
54.4g
Net carbs
52.4g
total carbs minus fiber
Fiber
2g
slows the glucose rise
- Sugars
- 25.4g
- Protein
- 5.7g
- Calories
- 377kcal
Notable nutrients
- Calcium89 mg
- Iron1.6 mg
- Sodium467 mg
- Vitamin A41 mcg
- Folate37 mcg
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
High in carbs and sugar — choose wisely and watch portions
Muffins are typically made with refined flour and sugar, giving them a medium to high glycemic impact. A standard medium muffin contains over 50 g of carbs and 25 g of sugar, which can raise blood glucose significantly. Whole-grain or bran muffins with less added sugar are lower-GI alternatives, but portion size still matters. This is general nutrition information, not medical advice — people with diabetes should confirm serving guidance with their care team.
Portion guidance
A single medium store-bought muffin (around 113 g) is a full serving and delivers roughly 52 g of net carbs with a glycemic load of about 17, which is in the medium range. For better blood sugar management, consider a mini muffin (about half the size) or share a regular muffin. Pairing with protein (e.g., Greek yogurt or an egg) and avoiding sugary toppings can help moderate the glucose response.
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.
Using whole-grain or oat flour instead of white flour
Lowers the spikeWhole-grain flours retain more fiber and digest more slowly, lowering the overall GI of the muffin. Bran muffins or those made with oat flour typically have a GI at the lower end of the range.
Adding fruit, nuts, or seeds
Lowers the spikeBlueberries, walnuts, or flaxseed add fiber, protein, and healthy fats that slow carbohydrate digestion and reduce the glycemic spike compared to a plain muffin.
Reducing added sugar or using sugar substitutes
Lowers the spikeCutting sugar or using non-nutritive sweeteners (stevia, erythritol) directly reduces the fast-digesting carbohydrate content, lowering both GI and GL.
Commercial preparation with refined flour and high sugar
Raises GIMost store-bought muffins are made with white flour and high amounts of added sugar, producing a GI near the top of the range (65–70) and a high GL per serving.
Pairing tip
If eating a muffin, pair it with a protein source like a hard-boiled egg, cottage cheese, or a handful of almonds to slow glucose absorption. Avoid pairing with fruit juice or another high-carb item. For a balanced breakfast, consider half a muffin with scrambled eggs and vegetables instead of eating the whole muffin alone.
Why GI numbers vary
Muffin GI data varies widely because muffins are not a standardized food — recipes differ in flour type (white, whole wheat, oat, bran), sugar content, fat content, and added ingredients (fruit, chocolate, nuts). Published GI values for specific muffin types range from about 55 for bran or oat-based muffins to 70 for white flour, high-sugar varieties. We report the honest range (55–70) and classify muffins as medium because the midpoint and most typical commercial muffin land in that zone.
Not medical advice. This page is general nutrition information about Muffin. 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
The GI of a muffin ranges from about 55 to 70 depending on the recipe. Bran or whole-grain muffins with less sugar tend toward the lower end, while white flour, high-sugar varieties (like blueberry or chocolate chip from a bakery) are at the higher end. Because recipes vary so much, we report a range rather than a single value. In practical terms, treat most muffins as a medium-to-high GI food.
Standard muffins are not ideal for diabetes management due to their high refined carb and sugar content — a medium muffin can contain over 50 g of carbs. However, smaller portions of whole-grain or bran muffins with reduced sugar can be incorporated occasionally. Always pair with protein and consider the muffin's place in your total daily carb intake. People with diabetes should discuss serving sizes with their care team — this is general nutrition information.
Bran muffins and oat-based muffins typically have the lowest GI among common muffin types, often around 55–60. Muffins made with whole-wheat flour, added nuts or seeds, and sweetened with non-nutritive sweeteners or minimal fruit will also be lower-GI. In contrast, muffins made with white flour and high sugar content (e.g., chocolate chip, vanilla, or blueberry from a coffee shop) have the highest GI.
Standard muffins are very high in carbs (over 50 g net carbs per muffin) and generally do not fit into strict low-carb or keto diets. However, low-carb muffin recipes using almond flour, coconut flour, and sugar substitutes can be made at home and are compatible with low-carb eating. Store-bought 'low-carb' or 'keto' muffins are available but should be checked for net carb counts and ingredients.
Toasting a muffin can slightly lower its GI by promoting the formation of resistant starch, similar to what happens with bread. The effect is modest and does not transform a high-GI muffin into a low-GI food. Toasting may also reduce moisture content, which can slow digestion somewhat. The bigger factor remains the muffin's original ingredients.
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Reviewed by
Curex Editorial TeamReviewed for accuracy
Last reviewed July 2026