The Best Cereals for People With Diabetes

How to Choose a Diabetes-Friendly Cereal

breakfast cereal

Verywell / Zorica Lakonic

The best cereals for people with diabetes are nutritious and will help keep blood sugar levels stable. 

Eating a nutritious breakfast every day can jump-start your metabolism, prevent food cravings, and help you maintain a weight that supports your health. If you have diabetes, eating breakfast also helps you control your blood sugar.

If you usually skip a morning meal because you don’t have time, a nutritious breakfast cereal can be a quick and easy way to start your day. 

This article will explain how breakfast affects blood sugar levels and why you should choose cereals with a low glycemic index rating if you have diabetes. It also will help you learn about the common sweeteners that hide in popular cereals as well as some tips on choosing diabetes-friendly breakfast cereals.

How Breakfast Helps Blood Sugar

Research has shown that starting the day with a higher-fat, higher-protein, lower-carbohydrate breakfast can help stabilize your blood sugar levels and help you manage your weight if you have diabetes. Protein and fat help fill you up, which means you're likely to eat fewer calories throughout the day.

High blood sugar in the morning is common among people with diabetes. Blood sugar levels can also rise after breakfast, which can cause “a vicious cycle": High blood sugar can make you crave more carbohydrates, and eating more calories and carbs can cause your blood sugar to go up.

Choosing Cereal With a Low GI

If you have diabetes, choose foods with a low glycemic index (GI) rating. This number measures how fast the carbohydrates in a food will raise your blood sugar levels. The lower the GI index number, the longer the food takes to digest and get absorbed into your blood. When food takes longer to digest, you will be less likely to see a big and fast increase in your blood sugar.

Looking for a breakfast cereal with the lowest GI rating can help keep your blood sugar levels steady. Keep these numbers in mind:

  • Low-glycemic foods are rated 55 or less.
  • Medium-glycemic foods are rated between 56 and 69.
  • High-glycemic foods are rated from 70 to 100.

Simple vs. Complex Carbs

Carbohydrates are also often classified as "simple" or "complex." The glycemic index was created as a better way to categorize carbohydrates, especially in terms of how they affect blood sugar.

Where Do I Find the GI?

If you’re at a grocery store in Australia or New Zealand, you’d see the GI index of a breakfast cereal right on the box. These countries encourage food manufacturers to put this information on food labels but other countries—including the United States and Canada—do not.

Research by Health Canada published in an American scientific journal found that consumers could be misled if glycemic index values were put on food labels in the U.S. The researchers said that not only are foods with low GI numbers necessarily nutritious but that the numbers could vary depending on the lab conducting the testing.

You can look for and often find GI index ratings using the "International tables of glycemic index and glycemic load values 2021" published by the American Journal of Clinical Nutrition. This index lists about 4,000 food items—about 60% more than the index published back in 2008.

Can Cereal Be Healthy?

Some breakfast cereals are more nutritious than others. There are many processed cereals on the market that are full of extra calories, carbohydrates, and added sugar—none of which are helpful for people with diabetes.

To make sure you’re meeting your nutrition goals, go for whole-grain cereals that have no more than 6 grams of sugar and at least 3 grams of fiber per serving. Whole-grain cereals tend to have more fiber and often contain high-protein ingredients like nuts. Whole grains have also been shown to reduce the risk of heart disease, which is common in people with diabetes.

If you have diabetes, a good time to eat cereal is before you exercise. Physical activity helps to burn sugar (glucose). 

If you take an oral medication or insulin to manage your blood sugar, you'll likely need to eat carbohydrates before exercise to prevent low blood sugar while working out.

Choose Wisely

If you have diabetes, choose breakfast cereal mindfully and pay attention to portions. Cereals that have been fortified with vitamins and minerals can help you meet your nutritional needs.

Tips for Diabetes-Friendly Cereal

If you want to eat cereal for breakfast, here are some tips that can help you lower the carb content and make the morning meal more diabetes-friendly.

  • Try hot cereal: Oatmeal, quinoa, or another whole-grain blend can be a more nutritious version of a breakfast cereal. Add chopped nuts or nut butter for added fiber, protein, and healthy fat. For example, combine 1/2 cup cooked oatmeal with 3/4 cup blueberries and 2 tablespoons chopped walnuts, topped with cinnamon.
  • Stick to one serving: Portion out the cereal with a measuring cup to make sure you know how much you’re eating. 
  • Check the ingredients: The cereal is made with whole grains if the first ingredient on the list says “whole." Other grains in breakfast cereals can be “refined” and are not as nutritious. 
  • Skip sweeteners: Avoid adding dried fruit, sugar, or other sweeteners like agave, honey, or table sugar to cereal, which adds more calories and sugar.
  • Add fiber: Increase the fiber content of your breakfast with a serving of high-fiber fresh or frozen fruit, such as blueberries, raspberries, or strawberries. You can also boost nutrition and fiber by adding chia and flax seeds. 
  • Use plant-based milk: Unsweetened almond milk has fewer carbohydrates than cow's milk and still tastes great with cereal. 
  • Make a yogurt parfait: Skip the milk altogether and use low-fat Greek yogurt to boost the protein and reduce the carbohydrates in your cereal. 

"Carbs" Is a Loaded Term

"Carbohydrates" refer to fiber, starch, and sugar. The term "total carbohydrates" on food labels refers to all three. In general, it's wise to eat more of the first type, some of the second, and only a little of the third.

Types of Whole Grains

When you’re shopping for cereal, look for the following words on the nutritional label to help make sure that you're choosing one that has whole grains:

  • Barley
  • Brown rice
  • Millet
  • Oats
  • Quinoa
  • Wheat bran
  • Whole-corn/cornmeal
  • Whole-grain buckwheat
  • Whole-grain spelt flakes
  • Whole-oat flour
  • Whole-wheat flour
  • Wild rice

Common Hidden Sweeteners in Cereal

Finding hidden sugars on an ingredients list can take some detective work. Here are a few terms that manufacturers use to describe the sweeteners that may be in a breakfast cereal:

  • Agave nectar
  • Brown sugar
  • Cane crystals and sugar
  • Corn sweetener and syrup
  • Crystalline fructose
  • Dextrose
  • Evaporated cane juice
  • Fructose
  • Fruit juice concentrates
  • Glucose
  • High-fructose corn syrup
  • Honey
  • Maple syrup
  • Malt syrup
  • Maltose
  • Molasses
  • Raw sugar
  • Sucrose
  • Syrup

Choosing the Right Brand

If you have diabetes, you can figure out which cereals work best for you by testing your blood sugar before you eat and two hours after you eat breakfast. If your blood sugar levels are on target, then you’ll know that cereal could be an option for you. 

The following brands of cold cereal may help you keep your blood sugar stable and keep you feeling satisfied after breakfast: 

  • Barbara’s Bakery Puffins (cinnamon and honey rice)
  • Cascadian Farm Organic Purely O's
  • Cheerios
  • Fiber One
  • Kashi (certain varieties, such as Puffed Rice, GoLean)
  • Kellogg’s All-Bran
  • Kellogg’s Special K High Protein
  • Kix
  • Quaker Crunchy Corn Bran
  • Post Bran Flakes
  • Wheaties

Summary

If you have diabetes, eating breakfast can help you stabilize your blood sugar while ensuring you get vitamins, minerals, and fiber in your diet. However, many cold breakfast cereals are loaded with calories, carbohydrates, and sugar, so it's important to choose wisely. Foods with a low glycemic index rating are best if you have diabetes. Read the ingredients label on a breakfast cereal, stick to one serving, and avoid adding any sugary extras.

Frequently Asked Questions

  • If oatmeal is so good for diabetics, why shouldn't I eat instant oatmeal?

    Of the three main types of oatmeal (steel-cut, rolled, and instant), instant oatmeal contains the most sugar and the least fiber. And its high GI rating (in the low 80s) means it's more likely to spike your blood sugar.

  • What about rolled oats as an alternative?

    Also known as old-fashioned oats, rolled oats are a better choice for people with diabetes. And for many people, the 10-minute cooking time is doable in the morning. But you can still do better than the 45 to 55 GI rating.

  • What can I do to make steel-cut oats taste better? It's too chewy.

    That's the fiber, which contributes to this offering's low GI rating (usually, under 40). A simple solution is to soak the steel-cut oats in almond milk overnight. (Add some diced fruit and a dash of cinnamon for flavor.) By morning, the oatmeal will be soft. Plus, all you'll have to do is grab the Mason jar (and a spoon) before running out the door.

8 Sources
Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
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  2. Bonsembiante L, Targher G, Maffeis C. Type 2 diabetes and dietary carbohydrate intake of adolescents and young adults: what is the impact of different choices? Nutrients. 2021;13(10):3344. doi:10.3390/nu13103344

  3. Harvard T.H. Chan School of Public Health. Harvard University. Carbohydrates and blood sugar.

  4. Aziz A, Dumais L, Barber J. Health Canada’s evaluation of the use of glycemic index claims on food labelsThe American Journal of Clinical Nutrition. 2013;98(2):269–274. doi:10.3945/ajcn.113.061770. 

  5. Atkinson F, Brand-Miller J, Foster-Powell K, Buyken A, Goletzke J. International tables of glycemic index and glycemic load values 2021: A systematic review. The American Journal of Clinical Nutrition. 2021;114(5):1625–1632. doi:10.1093/ajcn/nqab233.

  6. Aune D, Keum N, Giovannucci E, et al. Whole grain consumption and risk of cardiovascular disease, cancer, and all cause and cause specific mortality: systematic review and dose-response meta-analysis of prospective studies. BMJ. 2016;353:i2716. doi: 10.1136/bmj.i2716

  7. Francois ME, Baldi JC, Manning PJ, et al. "Exercise snacks" before meals: A novel strategy to improve glycaemic control in individuals with insulin resistance. Diabetologia. 2014;57(7):1437-1445. doi:10.1007/s00125-014-3244-6.

  8. American Diabetes Association. Understanding carbs; find your balance.

Additional Reading

By Barbie Cervoni, RD
Barbie Cervoni MS, RD, CDCES, CDN, is a New York-based registered dietitian and certified diabetes care and education specialist.