Corn Gluten Meal is a kind of by-products of corn starch and corn oil; people also call it corn sticky protein substance. The natural corn gluten meal with the golden color, the protein contents is higher, the color is fresher too, it makes great difference because of different kinds of producing techniques, low-protein content is under 25% or so , while the high-protein content is over 60%.
　　The structure of the amino acid of the Corn Gluten Meal is not optimum, especially the contents of the lysine and tryptophan are not enough in content, while the Methionine is high, the Corn Gluten Meal contents carotene is high, so it is the reddish-yellow color, if the protein is over 60%, and the reddish color will be fresher. Corn Gluten Meal plays the coloring role in the field of the birds’ domestic animal.