The body wall of sea cucumber contains a high content of protein, mainly collagen, reaching 76.5%. Protein of sea cucumber contains more than 18 kinds of amino acids in a good proportion, most of which are essential amino acids for human body. The content of arginine in sea cucumber is much higher than other seafood. Arginine is an important component of male sperm cells and a raw material for synthesizing human collagen. Arginine can promote cell regeneration and repair after body injury, improve the immune activity of lymphocytes, enhance human immunity and prolong life, which coincides with the theory of "tonifying kidney and replenishing essence" in traditional Chinese medicine.

Sea cucumber protein is mainly collagen, and its function is better than that of donkey-hide gelatin, glue board and antler glue assisted by traditional Chinese medicine. The rich glycine and basic amino acids in this collagen are the material basis for hematopoiesis, nourishing blood (biosynthesis of heme and globin) and promoting calcium absorption. Bioactive peptide is a kind of molecular polymer between amino acid and protein. As small as two amino acids, as large as hundreds of amino acids are connected by peptide bonds, which has very important biological significance.