Fish skin and scales were digested by Directed restriction biological enzyme digestion into larger molecular weight collagens which then were digested again, microporous membrane separated, purified , spray dried and become low-molecular active fish collagen powder and fish collagen peptide powder.

   Fish collagen peptide is white , without any smell scents and soluble in the water quickly (wettability and dispersibility),which makes it a very wide range of applications. For instance, it can be applied to the functional candies drinks, nutritions and cosmetics.