The Small Intestine: Where Nutrients Are Absorbed

The small intestine is about 20 feet long — the body’s main nutrient absorption site.
Its inner surface is covered in villi and microvilli that massively increase surface area.
This structure allows your body to absorb almost all the proteins, carbs, and fats you eat.
Nutrients pass through the intestinal wall directly into the bloodstream.
The pancreas and liver send enzymes and bile to help digestion here.
Each section — duodenum, jejunum, ileum — has a specialized role in absorption.
The small intestine moves food slowly to maximize nutrient uptake.
Even though it’s called “small,” it handles the biggest job in digestion.
Damage to its lining can lead to nutrient deficiencies and fatigue.
Think of it as your body’s nutrient superhighway — small in width, mighty in power.