30 Low Glycemic Index Foods for Diabetes That Help Control Blood Sugar (2026 Guide)

Eating right is the first step in diabetes management. One of the best nutrition tips is to eat foods that have a low glycemic index (GI). They are broken down and absorbed more slowly than high-GI foods, causing a more gradual rise in blood sugar compared to high-GI foods. When a person with diabetes or prediabetes adopts a low-GI meal plan along with a healthy diet and medical advice, consuming low-GI foods can help them manage their glucose levels.

This complete guide will present 30 low-glycemic foods for diabetes and give you a better understanding of the glycemic index and how it relates to glycemic load and meal ideas you can pursue to help maintain healthy blood sugar levels.

What Is the Glycemic Index?

The Glycemic Index (GI) is an index designed to rank foods according to how fast the glucose in the bloodstream spikes after eating a food containing carbohydrates. The score for foods is given a value from 0 to 100, with pure glucose being a score of 100.

The following is a general guideline for classification of foods:

• Low GI: 55 or less

• Medium GI: 56–69

• High GI: 70 or above

Foods with a lower GI will break down into glucose more slowly into the bloodstream. This slower digestion can help lower the surge in blood sugar that can occur after eating and may help many people with diabetes keep their blood sugar levels more stable in their overall healthy eating plan.

The importance of low-glycemic foods for people with diabetes.

There are a number of potential benefits that individuals with diabetes can gain from selecting low-glycemic foods.

More stable blood sugar.

Low GI foods are foods that break down slowly in the body, causing much less of a spike in blood glucose after eating.

Improved Fullness

There are lots of foods with a low glycemic index that are rich in fiber and protein so that you feel full for longer and are not tempted to snack on unnecessary items.

Better Weight Management

Good body weight is related to better insulin sensitivity, and numerous low-GI foods complement weight-management diets.

Heart Health Support

Diabetics are more prone to cardiovascular diseases. Common foods in low-GI diets, such as whole grains, legumes, nuts, vegetables, and fruits, also contain nutrients that promote heart health.

More Consistent Energy

Many people find themselves having more consistent energy levels during the day because glucose is a slow-release carbohydrate.

Glycemic Index vs. Glycemic Load

Glycemic index is often mistaken for glycemic load, which are different.

For instance, a watermelon has a high glycemic index but a low glycemic load because an average portion of watermelon offers relatively few digestible carbohydrates.

The knowledge of both measures enables individuals to make better food decisions than if they only used one measure.

List of 30 foods with a low glycemic index from foods #1 through #15 that are suitable for diabetics.

Below are some foods with a low glycemic index (GI 55 or lower) that may be helpful to include in a diabetes diet. None of these foods have a direct effect on blood sugar, but they all contribute to general metabolic health through the addition of fiber, healthy fats, protein, vitamins, or minerals.

1. Steel-Cut Oats

Approximate GI: 52

Steel-cut oats are the least processed whole oats, which are digested more slowly than instant oatmeal. The soluble fiber in them, particularly beta-glucan, could potentially enhance blood sugar control and satiety.

Serving sizes: ½ cup cooked with berries and cinnamon.

2. Lentils

Approximate GI: 32

Lentils are a good source of plant-based protein, dietary fiber, iron, and folate. They have slow digestion, which decreases 'blood sugar' spikes after eating.

Ideal for serving: Lentil soup or adding to salads.

3. Chickpeas

Approximate GI: 28

The fiber, protein, and complex carbohydrates in chickpeas are slowly digested. They make a great addition to salads, curries, and homemade hummus.

Best served: ½ cup cooked.

4. Black Beans

Approximate GI: 30

The resistant starch and soluble fiber in black beans promote healthy digestion and help to moderate the uptake of glucose.

Best served: In bean bowls, soup, or tacos.

5. Kidney Beans

Approximate GI: 24

Kidney beans are one of the lowest-GI legumes. They are also rich in potassium, magnesium, and protein.

Best serving: Chili or mixed bean salads.

6. Apples

Approximate GI: 36

Apples are naturally rich in fiber (pectin), vitamin C, and antioxidants. It is better to eat the whole fruit than to drink the juice, as this slows down the absorption of sugar.

Best served: One medium apple with peanut butter.

7. Pears

Approximate GI: 38

Pears contain a great deal of fiber and water, which help keep you full, but have not a significant impact on blood sugar.

Good for serving: Fresh as a snack.

8. Cherries

Approximate GI: 22

Sweet cherries have a low glycemic index and are a natural source of antioxidants called anthocyanins.

Best served fresh: 1 cup.

9. Blueberries

Approximate GI: 53

Blueberries are rich in fiber, vitamin C, and plant compounds. They are good with Greek yogurt or oatmeal.

Best served when fresh—¾–1 cup.

10. Oranges

Approximate GI: 43

Whole oranges contain vitamin C, potassium, and fiber. Instead, drink a whole orange rather than orange juice.

Best serving size: 1 medium orange.

11. Broccoli

Approximate GI: 15

Broccoli is very low in carbohydrates and has a high content of vitamin C, vitamin K, and fiber.

Best cooked: Steamed or roasted.

12. Spinach

Approximate GI: 15

Spinach is low in digestible carbohydrates but rich in iron, folate, and magnesium.

Best served: Sautéed, smoothies, and salads.

13. Sweet Potatoes (Boiled)

Approximate GI: 44

Typically, boiled sweet potatoes have a lower GI than baked sweet potatoes. They are a source of vitamin A, fiber, and potassium.

Best served: ½ medium boiled sweet potato.

14. Quinoa

Approximate GI: 53

Quinoa is a whole-grain food providing complete protein, fiber, magnesium, iron, and a moderate response to blood sugar.

Best served: ½ cup after cooking.

15. Barley

Approximate GI: 28

Barley contains a high amount of beta-glucan, a type of fiber that can help to regulate cholesterol and blood sugar levels.

Best served: As soups, grain bowls, or side dishes.

Low Glycemic Index Foods for Diabetes (Foods #16 – #30)

When planning your grocery list, try to mix in low-glycemic items to help make more well-rounded and satisfying meals. These foods can be part of a diabetes care plan along with lean protein, healthy fats, and regular exercise to help maintain healthy blood sugar levels.

16. Walnuts

Approximate GI: 15

Walnuts are full of healthy omega-3 fats, protein, and fiber. They are also low in digestible carbohydrates, meaning they have little effect on blood sugar.

Best serving: 1 oz (approx. 14 half servings)

17. Almonds

Approximate GI: 15

Almonds contain vitamin E, magnesium, protein, and healthy fats, which can help to enhance meal satisfaction.

Best serving: 23 almonds

18. Pistachios

Approximate GI: 15

Pistachios are high in fiber and protein, making them a good snack between meals.

Best serving: 1 ounce

19. Plain Greek Yogurt

Approximate GI: 35

Unsweetened Greek yogurt is a good source of protein and calcium and has fewer carbohydrates than regular yogurt.

Best served with: ¾ cup plain

20. Cottage Cheese

Approximate GI: 10

Cottage cheese provides good protein and is a great complement to fresh berries or vegetables.

Best serving: ½ cup

21. Avocados

Approximate GI: 15

Avocados are rich in heart-protective monounsaturated fats, potassium, and fiber.

Best eaten: 2 to 5 days after buying. Best eaten right after purchase: half medium avocado.

22. Tomatoes

Approximate GI: 15

Fresh tomatoes have few carbs and plenty of vitamin C and lycopene.

Serve with 2 cups of basil leaves, oregano, oregano oil, and olive oil (as a garnish).

23. Cucumbers

Approximate GI: 15

Cucumber can be a great side dish or snack because it's hydrating, low-calorie, and makes a great side dish or snack.

Best served by slicing: One cup

24. Bell Peppers

Approximate GI: 15

High in vitamin C and antioxidants and low in calories, bell peppers are a source of fiber.

Store in the refrigerator: Refrigerate for up to 7 days.

25. Mushrooms

Approximate GI: 15

Mushrooms are not high in carbohydrates and contain B vitamins and antioxidants.

Best serving: 1 C when cooked

26. Cauliflower

Approximate GI: 15

Cauliflower makes a great alternative to rice or mashed potatoes in diabetic recipes.

Best kept: One cup stored in the refrigerator for up to a week

27. Green Beans

Approximate GI: 15

Green beans are high in fiber, low on the glycemic index, and rich in vitamins.

Not suitable for freezing: One cup cooked

28. Zucchini

Approximate GI: 15

Zucchini is versatile, low in carbohydrates, and can be used in various healthy recipes.

Best served after cooking: One cup serving.

29. Strawberries

Approximate GI: 41

Strawberries are sweet, but not so sweet that they are loaded with sugar, and they are high in vitamin C.

Best stored: Frozen. One cup will last for a week in the fridge or freezer.

30. Peanuts

Approximate GI: 14

Peanuts are a great source of healthy fats, protein, and fiber, which help you to feel full.

Best serving size: 1 ounce (unsalted)

Tips for Following a Low Glycemic Diet for Diabetes

• Fill half the plate with non-starchy vegetables.

• Eat whole grains rather than refined grains.

• Combine carbohydrates with lean protein or health fats.

• Eat whole fruits instead of drinking fruit juice.

• Reduce sugary beverages, sweets, and highly processed foods.

• Monitor servings, including nutritious foods.

• Be active the majority of the day each day.

• Take your blood sugar as directed by your healthcare provider.

Foods to Limit

Although all foods can be enjoyed by everyone, these foods have a greater glycemic response and are better consumed in smaller amounts or less frequently:

• White bread

• Sugary breakfast cereals

• White rice

• French fries

• Regular soft drinks

• Candy

• Cakes and pastries

• Sweetened fruit juices

• Processed snack foods

• Sugary coffee beverages

Frequently Asked Questions

Do low-glycemic foods help type 2 diabetes?

Yes. Low GI foods tend to produce a gradual increase in blood sugar levels and may be part of a healthy diet for people with type 2 diabetes.

Does it make sense to eat fruit as part of a diabetes diet?

Yes. Whole fruits (apples, pears, berries, cherries, and oranges) contain fiber, vitamins, and antioxidants. It's all about the quantity, too.

Is the glycemic index the only factor to consider?

No, think about the portion size, total amount of carbs, fiber, protein, healthy fats, and the quality of the food you eat. Glycemic load and meal composition are also important.

Does the potato always have a high GI?

Not always. The GI of boiled sweet potatoes is usually lower than for baked white potatoes, and how they are prepared can influence the GI.

Conclusion

Opting for low-glycemic-index foods for diabetes can be a helpful strategy to create a well-balanced diet that helps maintain healthy blood sugar levels. Legumes, whole grains, vegetables, fruits, nuts, and seeds offer good nutrition and are typically low-glycemic foods.

Keep in mind the glycemic index is only a single component of a healthy diet. Eat low-GI foods with lean protein and healthy fats, and get regular exercise and advice from your health care professional or registered dietitian to develop an individual diabetes meal plan.

Making consistent and sustainable food selections can help you get delicious and healthy meals while staying healthy and helping manage your blood sugar long-term.

References

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Centers for Disease Control and Prevention. (2025). Diabetes. https://www.cdc.gov/diabetes/

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U.S. Department of Agriculture & U.S. Department of Health and Human Services. (2020). Dietary Guidelines for Americans, 2020–2025 (9th ed.). https://www.dietaryguidelines.gov/