Which is absorbed faster, di- and tri-peptides or free form amino acids?

Di- and tri-peptides are absorbed faster than free form amino acids due to the efficiency of peptide transport mechanisms in the intestinal lining. The human body has specialized transporters that facilitate the rapid uptake of these small peptides because they are more stable and require less processing for absorption.

When proteins are broken down during digestion, they yield di- and tri-peptides, which are more readily taken up by enterocytes (intestinal cells) compared to the individual amino acids. This faster absorption can be beneficial for various biological processes, including muscle recovery and synthesis, particularly after exercise when the demand for amino acids is heightened.

Free form amino acids do absorb into the bloodstream, but their transport does not occur as efficiently as that of di- and tri-peptides. As a result, these peptides provide a quicker source of amino acids for the body, making them advantageous, especially in scenarios where rapid nutrient delivery is necessary.