Question

what are substances that need to be digested before absorption

Answer 1

The food contains three macronutrients that require digestion before they can be absorbed: fats, carbohydrates, and proteins. Through the process of digestion, these macronutrients are broken down into molecules that can traverse the intestinal epithelium and enter the bloodstream for use in the body.

Answer 2

Along the way, food is broken down into tiny molecules so that the body can absorb nutrients it needs:

• Protein must be broken down into amino acids.
• Starches break down into simple sugars.
• Fats break down into into fatty acids and glycerol.