A Closer Look at GMO Corn, Nutrition Facts, and Making Informed Food Choices
We’ve all had the thought: what happens when corn goes in and comes out looking exactly the same?! Does the body get any value from eating it? Isn’t it a vegetable? But it’s also used to make chips, breads, oil, and sugar! As a health coach, when people ask me about corn and whether it belongs in their routine, I have to admit, it can be a tricky one.
Technically, corn is a vegetable, specifically a starchy vegetable, but it is also considered a cereal grain. In fact, it is one of the leading cereal crops in the world. Corn is used as animal feed and, to a smaller extent, for fuel production. A large percentage of corn production is used for livestock feed, while the remaining portion goes toward products for human consumption. The reality is, no matter where you turn, corn is there!
When it comes to nutrition tips around corn, understanding the different types and how they are used can help us make more informed choices.
There are four main types of corn. First, there is sweet corn, which is the corn we typically think of when we picture corn on the cob or canned corn. Then there is popcorn, which is more like a dry seed with a starchy center protected by a hard outer shell. Flint or Indian corn is tougher and comes in colors like red, blue, black, and white. This is often the decorative corn we see around fall. Lastly, there is dent corn, which looks similar to sweet corn but has a small dent at the top of each kernel. Dent corn is mostly used for animal feed and processed foods like tortilla chips and grits.
Knowing the differences between corn varieties helps us better understand what we are consuming and where it comes from.
Before we look at the nutrition of corn, there is another factor worth discussing. Corn is one of the most genetically modified crops in the world. In 2016, about 92% of corn grown in the United States was genetically modified. Crops are often modified for reasons such as pest resistance and tolerance to certain agricultural practices involving herbicides and pesticides.
There is ongoing research around GMO crops and their effects. Some studies involving animals have raised questions about possible impacts on organs like the liver and kidneys. When it comes to choosing corn, many people prefer organic, non-GMO varieties as a personal nutrition choice.
With that in mind, let’s look at corn’s nutrition profile. One cup of raw, sweet yellow corn contains about 125 calories, 1.96g of fat, 4.74g of protein, and 27.1g of carbohydrates, including around 2.9g of fiber. Corn also contains vitamin C, potassium, some B vitamins, vitamin A, and smaller amounts of other vitamins and minerals.
Corn also contains lutein and zeaxanthin, which are antioxidants associated with eye health. Research suggests these compounds may help support eye health and may play a role in reducing the risk of conditions like cataracts and age-related macular degeneration. The exact nutrition profile can vary depending on the type of corn, how it is grown, and whether it is GMO or non-GMO.
So yes, corn can offer some nutritional value. At the same time, we want to consider the amount we are eating and the quality of the corn source.
Now for the question everyone asks: why can we sometimes see corn in our stool looking almost exactly the same?
The answer comes down to the outer shell of the kernel. Corn has a layer made of cellulose, which the human body does not break down. The body can still access and digest much of what is inside the kernel, but the outer layer can pass through intact. That is what we are seeing.
Overall, corn is one of those foods that can feel complicated because it is everywhere, yet it is also a food many people enjoy. For me, corn is a starchy vegetable I eat occasionally in smaller amounts, and I make an effort to choose organic, non-GMO sources when possible.
When it comes to processed foods made from corn, I personally have them less often and pay attention to ingredient labels, especially when it comes to refined oils and syrups made from corn.
At the end of the day, nutrition is about understanding your options. With a little knowledge, you can make choices that fit your own approach to healthy eating and what works for you.