Which nutrient passes through the large intestine mostly indigested and unabsorbed?

Fiber is the nutrient that passes through the large intestine mostly indigestible and unabsorbed. It is a carbohydrate found in plant foods that the human body cannot fully break down or absorb. Instead, fiber contributes to digestive health by adding bulk to stool and helping regulate bowel movements. Additionally, some types of fiber can be fermented by gut bacteria, producing beneficial short-chain fatty acids.