Gelatin is a kind of structural protein, widely spreading in bones, tendons andother connective tissue, accounting for70%of the dry matter in some fish skin. Inorder to make the most use of the waste materials from the aquatic products process,the getatin from walleye pollock skin, tilapia skin and donkey skin was extracted.Using the donkey skin gelatin as positive control, the effect of improving Irondeficiency anemia (IDA) of gelatin from walleye pollock skin and tilapia skin isrespectively studied and it...