Countries around the world are not the same definition of food additive, the United Nations Organization (FAO) and the World Health Organization (WHO) Joint Codex Alimentarius Commission on food additives is defined as: food additives is generally a small amount of consciously added to food to improve food appearance, flavor, and the nature of organizational structure or storage of non-nutritive substances. According to this definition, in order to enhance the nutritional content of food fortifier for the purpose of food additives in the food should not be included within the scope.
　　Accordance with the "Food Safety Law," 99, China's food additive is defined as: food additive, means to improve food quality and color, smell and taste and for the preservation, preservation and processing needs into food synthetic or natural material.
　　Food additive has the following three characteristics:
　　First of substances added to food, so it generally does not separate as a food to eat;
　　Second, both synthetic materials, including natural substances;
　　The third is added to food is intended to improve food quality and color, smell, taste and for the preservation, preservation and processing needs!