Corn Nutrition Facts and Health Benefits

Corn is a staple in cuisines all around the world. In the United States, nothing says summertime quite like corn on the cob. While plenty of people enjoy corn, many don't realize it's a very nutritious option to add to any meal.

In general, eating corn on a regular basis has many benefits and ensures a healthy diet rich in thiamin, countless vitamins, and a slew of essential minerals. One ear of corn (corn on the cob) contains approximately 88 calories and will not ruin your diet, regardless of whether you are counting calories or not. A budget-friendly and easy-to-find grain, corn or corn on the cob is an excellent source of carbohydrates and higher in protein than one might think - and that's just the tip of the iceberg.

Corn Nutrition Facts

As mentioned, one medium-sized ear of corn (6 3/4" to 7 1/2" long) has 88 calories and provides 1.4g of fat, 19g of carbohydrates, and 3.3g of protein. In addition to being a good source of thiamin and other minerals, corn is rich in vitamins C, E, and A. Corn on the cob also provides some fiber and a small amount of potassium. This nutrition information is provided by the USDA.

Carbs

When it comes to the 19 grams of carbohydrates found in corn, fiber only makes up about 2 grams of the total number of carbs, and natural sugars make up around 6.4 grams. As a result, corn is considered moderate on the glycemic index (GI) scale, with a rating that falls between 56 and 69.

Note: Since fats, fiber, and protein slow the release of sugars into the bloodstream, consuming corn with butter, fiber, or protein-containing foods will substantially affect the overall GI rating. In general, the GI is a measure of foods eaten plain, in isolation, and does not have much bearing on foods consumed in meals.

Fats

With only 1.4 grams per medium-sized ear, corn is naturally low in fat. The majority of fat in corn is from heart-healthy monounsaturated or polyunsaturated fats.

Protein

Corn has just over 3 grams of protein per ear. Compared to most vegetables, corn is higher in protein. That's because corn is technically not a vegetable at all but rather a whole grain.

Vitamins and Minerals

Corn provides 13% of the daily value (DV) or 0.16mg of thiamin and contains several vital nutrients, including potassium, iron, zinc, magnesium, phosphorus, and selenium. This grain is also a good source of folate, vitamins C and E, and vitamin A in the form of beta-carotene.

Calories

As suggested, corn on the cob, sans the toppings, is about 88 calories. Of course, consuming corn with butter or other garnishes will also increase the total number of calories while adding other nutrients, such as fat. One cup of corn (off the cob), plain, provides about 125 calories.

The calories of a boiled ear of corn vs grilled will not differ unless you introduce another food item in preparation, such as salt, butter, oil, or some other toppings. Some of the vitamins and minerals could be lost, however, during the cooking process when boiling corn.

Health Benefits

Corn offers several health benefits beyond its vitamin and mineral content. Depending on the color, corn is rich in various antioxidants and beneficial plant compounds that protect against disease.

Reduces Risk of Type 2 Diabetes

Polyphenols are beneficial plant compounds in whole grains, fruits, vegetables, and nuts. Purple corn owes its color to a type of polyphenol called anthocyanin, which has been shown to improve insulin regulation and glucose.

Including a variety of colorful, plant-based foods in your meal plan, like purple corn, is a proactive way to prevent the onset of type 2 diabetes. Consider the carbohydrate count if you have diabetes and want to incorporate purple corn into your diet.

May Help Prevent Colon Cancer

Corn is a good source of fiber that promotes the growth of "good bacteria" in the gut. These bacteria produce short-chain fatty acids to help prevent colon cancer. Eating fresh corn, popcorn, and other whole-grain corn products will ensure you get the most fiber out of your corn consumption.

Supports Weight Management

The most filling snacks are those high in protein and fiber, like popcorn. One cup of air-popped and unbuttered popcorn provides 31 calories, 1 gram of protein, and 1 gram of fiber.

Popcorn is a whole-grain snack that's minimally processed, especially when you make it fresh. Since snacks comprise about a third of most people's daily intake, choosing snack foods wisely can significantly impact body weight.

Protects Eyesight

Corn contains lutein and zeaxanthin, the forms of vitamin A that are especially beneficial for eye health. Because these compounds become concentrated in the retina, they are associated with preventing age-related macular degeneration.

Scientific studies have shown that the combination of lutein and zeaxanthin, along with vitamin C, vitamin E, copper, and zinc, all found in corn, can effectively protect against this common cause of vision loss.

Promotes Heart Health

Corn provides several nutrients that offer proven cardiovascular benefits. The fiber in corn and other whole grains helps reduce cholesterol levels.

Potassium is well-known to keep blood pressure levels down, and corn contains about 6% of the daily value set by the FDA. Potassium is a "nutrient of public health concern" because not everyone consumes adequate amounts of it daily.

Corn also has a decent amount of magnesium, about 9% to 12% of adult needs. Consuming adequate amounts of magnesium in the diet reduces the risk of stroke and ischemic heart disease. Eating fresh corn, popcorn, or even canned corn (without added salt) can help protect your heart from long-term damage.

Allergies

Food allergies to corn and environmental allergies to corn pollen are possible. Corn allergies are difficult to diagnose, but an elimination diet is often used to determine whether symptoms improve when corn is no longer consumed. Corn allergies are typically triggered by corn protein, so protein-free corn products like high-fructose corn syrup don't necessarily need to be avoided because of an allergy.

Symptoms of corn allergies may include hives, diarrhea, difficulty breathing, and a weak pulse. If you suspect an allergy to corn, see an allergist for a professional evaluation.

Adverse Effects

Corn is one of the most genetically modified plants in the food supply. Genetically modified crops have altered DNA for various traits, such as resisting herbicide or increasing yield. One percent of the corn grown in the U.S. is sweet corn, and most are not genetically modified. Sweet corn can be found in frozen form, canned, or fresh. Genetically modified corn isn't used for human consumption but for livestock feed, fuel for cars, and oil used to make sunscreen and water bottles.

High fructose corn syrup is a sweetener derived from corn syrup. It's made by extracting corn kernels and treating them with an enzyme to make a thick, viscous syrup.

Although considered safe as other sweeteners by the FDA, high fructose corn syrup is prevalent in processed foods. It is associated with an increased risk of diabetes and other health conditions. Just as with other added sweeteners, limiting your intake of high fructose corn syrup is best.

Varieties

There are four basic types of corn: dent corn, flint corn, popcorn, and sweet corn. Dent corn is also known as field corn and is used for livestock feed and food products. Flint corn, though similar to dent corn, does come in various colors. Due to its diverse color palette, flint corn is considered ornamental and is commonly displayed for decoration. While popcorn can be used for decorating as well - plain popcorn is white in color and has a tough outer shell with a soft, starchy center (that steams and explodes when heated).

Finally, sweet corn is higher in starch and sugar. It's picked while still immature and tender. Sweet corn comes in white, yellow, or a combination of kernel colors. Thus, store-bought corn on the cob is categorized as sweet corn.

When It's Best

Fresh corn is in season during the summer months, from July through September. Choose corn that has firm, plump kernels. Skip any cobs with signs of mold, insects, or decay. You can find fresh corn in the stalks or already shucked.

Alternatively, corn products, including canned and frozen corn, are available all year long. Typically, canned corn often comes in a cream sauce or with added sugar or salt. So, checking the ingredients label to see what's in your product is a must. Corn-based products (like popcorn, cornmeal, corn starch, corn flour, corn grits, and porridge) are also available in grocery stores throughout the year and deserve a quick ingredients label-check before purchase as well.

Storage and Food Safety

Sweet corn is best eaten shortly after it's picked. The longer it sits, the less sweet it tastes. You can store corn in the refrigerator with the husks on or off. Raw corn that's been removed from the husk should be used within one or two days, however. And you can keep cooked corn in the refrigerator for up to five days.

Corn can also be frozen or canned at home. It is strongly suggested that you use dry or preserved corn products by the dates specified on the product label.

How to Prepare

Corn is usually cooked, but raw corn is edible too. Cut the kernels off the cob and add them to salads or other favorite dishes for a sweet crunch.

Shucked corn (meaning the skins and husks have been removed) can be grilled, boiled, microwaved, or steamed. If you prefer, leave the husks on for roasting or grilling and remove them before eating.

Corn is naturally sweet and doesn't need very much added flavoring to taste good. Keep corn recipes simple to enjoy the natural flavor and nutrition that this whole grain offers.