Which food groups do small intestines break down?

The small intestine primarily breaks down three main food groups: carbohydrates, proteins, and fats. Enzymes from the pancreas and bile from the liver aid in the digestion of these macronutrients. Carbohydrates are broken down into simple sugars, proteins into amino acids, and fats into fatty acids and glycerol. This process allows for the absorption of nutrients into the bloodstream for use by the body.