1) Small molecule peptide is easy to absorb and has no antigenicity

2) Small molecule peptides have strong biological activity and wide range of action

3) Small molecule peptide structure is easy to modify and recombine

4) Small molecule peptides do not cause overnutrition

5) The absorption and metabolism rate of small molecule peptides is faster than that of free amino acids

6) The absorption mechanism of small molecule peptides and amino acids is completely different

7) The human body can absorb and utilize more kinds of small peptides than amino acids

8) Small molecule peptides have physiological functions incomparable to amino acids