The “skin” of a corn kernel is made mostly of cellulose, a tough, fibrous material. Think of it as the Kevlar vest of the plant kingdom.
Your body produces some pretty powerful enzymes to break down starches, proteins, and fats. But when it comes to cellulose? We throw up our hands. Humans lack the specific enzyme (cellulase) needed to crack that outer shell.
That means the golden inside of the kernel—the part you actually want to digest—is often locked away inside an unbreakable little package. It’s like a birthday present you can’t unwrap!
So, What’s Really Happening?
When you chew corn, you chomp on the softer insides, releasing some starches and sugars that your body happily absorbs. That’s why eating corn still gives you energy.
But the outer hull (the shiny, yellow jacket) is mostly cellulose. It travels through your stomach and small intestine without being dissolved.
why is corn hard to digest? - Test Food Kitchen
It then moves into your large intestine, where bacteria have a party—but they can’t fully destroy the hull either. That’s the kernel you see later. It’s not “undigested corn”; it’s the empty shell of a kernel, like a ghost of a bean.
