Is Corn A Grain, A Fruit, Or A Vegetable—And Is It Actually Healthy?

Most nutritionists you ask will tell you corn qualifies as a whole grain.  

"Whole grains have three edible layers—the bran, germ, and endosperm," registered dietitian nutritionist Shamera Robinson, MPH, RDN, L.D., tells mbg. "Each layer offers a different ratio of macronutrients, vitamins, minerals, and antioxidants to help nourish your body. Brown rice, oats, and wheat are popular whole grains, but corn kernels also contain those three nutrient-rich layers," she says. 

Corn is also part of the grass family of plants, similar to wheat, barley, and rice, registered dietitian and spokesperson for the Academy of Nutrition & Dietetics Julie Stefanski, MEd, RDN, tells mbg. 

In terms of nutrition, corn is more similar to whole grain bread than to a vegetable, Stefanski says. "Just like one slice of bread, half a cup of corn contains a similar amount of calories and carbohydrates," she explains. 

According to Robinson, it depends on whom you ask. "Botanically, or based on plant science, a fruit contains seeds and comes from the flower of a plant," she explains. "Corn kernels certainly fit that description." 

"Corn is a culinary and cultural staple for people around the world," Robinson says. "While there may be debate on whether corn is a fruit, grain, or vegetable, there is no question about the nutrients it can provide." 

Corn is high in insoluble fiber, which is good for the gut and digestive health. "Insoluble fiber is beneficial for preventing constipation and helping us feel full after a meal," Stefanski says. If eating corn leads to an upset stomach, she recommends chewing each kernel thoroughly and limiting intake to just one ear of corn.