Is Corn Good for Diabetes? An In-Depth Guide
Written by Isabel Vasquez Larson RD, LDN
According to the American Diabetes Association, 11.8% of Hispanics had a diabetes diagnosis as of 2023. Since corn is a staple food in many Latine communities, you may wonder whether it’s bad (or even partly to blame) for diabetes.
I know a lot of my clients think that they should cut out cherished cultural foods like corn tortillas or arepas to prevent or manage diabetes.
Good news—corn is a whole grain that can absolutely be a part of a diabetes-friendly diet. Plus, we often pair it with other protein and fiber-rich foods to help prevent blood sugar spikes!
In this blog, learn all about the nutritional value of corn, how it impacts blood sugars, and how to enjoy it while managing diabetes. Let’s get to it!
Corn Nutrition Facts
Below are the main nutrients in one cup of yellow corn according to the USDA:
Carbohydrates: 31 grams (g)
Protein: 5 g
Fat: 2 g
Fiber: 4 g, or 14% of the daily value (DV)
Thiamin: 0.14 milligrams (mg), or 12% of the DV
Vitamin C: 8.2 mg, or 9% of the DV
Niacin: 2.5 mg, or 16% of the DV
Folate: 34 micrograms, or 8.5% of the DV
As you can see, corn is rich in a few different vitamins, as well as fiber. It’s primarily a source of carbohydrates, but it does contain some protein and fat, too.
How Does Corn Affect Blood Sugars?
May Lower Your Risk of Diabetes
Corn is commonly mistaken as a vegetable, but it’s actually a grain. And not just a grain, but a whole grain!
This is good news for diabetes prevention because eating more whole grains is linked with lower risk of diabetes, per a 2022 study in Foods.
In fact, the USDA recommends that at least 50% of our grains be whole grains because of their superior nutrition profile and health benefits.
May Reduce Your Risk of Developing Heart Disease
Consuming whole grains can also reduce the risk of cardiovascular disease, per a 2019 study in The Lancet.
If you have diabetes, you’re twice as likely to have heart disease, per the CDC, so this is another meaningful benefit of whole grains like corn.
May Improve Insulin Sensitivity
Corn is also a source of fiber—a key nutrient for diabetes management, per the CDC. It slows down your body’s absorption of sugars. This can help improve insulin sensitivity and lower blood sugars, per a 2021 study in the Journal of Functional Foods.
A 2018 study in PLoS One found that purple corn may be especially beneficial for insulin sensitivity. The study found that purple corn increased the amount of insulin produced by cells and led the liver to absorb more glucose from the bloodstream.
That said, this was an in vitro study (meaning it was done in a test tube or petri dish), so we need research on actual humans to confirm these benefits.
Supports Cultural Connection
Here at Your Latina Nutrition, we’re always advocating for the value of our Latine cultural foods. They nourish us in so many ways—nutritionally, emotionally, and culturally—and are often central to our identities.
We know that enjoying corn is beneficial for many of our clients’ cultural well-being and we don’t take that lightly! This is another benefit worth celebrating. Because food is more than just nutrients—it’s culture and connection, too.
How to Enjoy Corn For Healthy Blood Sugars
For healthy blood sugars, it’s important to pair carbs (like corn) with protein, fat, and fiber, per the American Diabetes Association. These nutrients don’t spike blood sugars the way carbs can. This helps slow your body’s absorption of sugar to prevent blood sugar spikes.
Culturally, we often pair corn with protein, fat, and fiber anyway. We enjoy corn tortillas with beans, avocado, and meat. We add curtido, beans, and cheese to pupusas. And we fill tamales with meat and enjoy them with a side of beans and pico de gallo.
Here are a few examples of well-rounded Latine meals with corn that can promote healthy blood sugars:
Tacos made with corn tortillas, carne asada, guacamole, cotija cheese, and salsa
Arepa filled with shredded pork, peppers, onions, and cheese
Sancocho made with corn on the cob, your favorite meat, and veggies
Final Thoughts
Corn has a lot of nutritional value to offer, even if you have diabetes. It’s a whole grain that’s rich in fiber and packed with vitamins, which can help reduce the risk of diabetes and cardiovascular disease!
Since corn is rich in carbohydrates, pairing it with protein and fiber can not only help you manage your blood sugar levels, but help you feel fuller and energized longer.
So whether you have diabetes or not, there’s no need to fear this cultural food staple. If anything, it should be celebrated!
FAQs
Can corn raise blood sugar?
Yes, corn raises blood sugar because it contains carbohydrates. However, it has a low glycemic index and is a good source of fiber. Pairing it with foods rich in fiber, protein, and fat can help prevent blood sugar spikes and promote blood sugar management.
How much corn can someone with diabetes eat?
There is no one-size-fits-all amount of corn appropriate for someone with diabetes. What’s most important is monitoring your blood sugars, pairing corn with protein, fiber, and fat, and noticing how your blood sugars respond.
Is it better to eat fresh, frozen, or canned corn?
Fresh, frozen, and canned corn have similar nutritional benefits; however, canned or frozen corn may be higher in sodium. If you’re trying to eat less sodium, opt for fresh corn or no-salt-added frozen or canned corn.
Are corn tortillas better than flour tortillas for diabetes?
Corn tortillas are generally lower in total carbs and higher in fiber than flour tortillas, so they’re less likely to spike blood sugars. That said, either type of tortilla can fit in a diabetes-friendly diet when paired with fiber and protein-rich foods like fish, chicken, beans, salsa, peppers and onions, and avocado.
For more education on how to manage your health with your favorite Latine cultural dishes, join our nutrition library for just $27/month.
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