fish skin or scale collagen powder

Collagen is a kind of protein made up of amino acids, which can be made from bovine skin, bovine bone, fish skin, fish scale, pork skin, chicken bone and so on. It is composed of three peptide chains which twisted into screw-type. Its protein content is above 95%, having 18 kinds’ amino acids such as glycine, proline, hydroxyproline and so on. And the hydroxyproline is the most special amino acid that only exists in collagen. 7 kinds of which are essential for people.