Food additives to improve the quality of the food color, smell and taste, as well as the need for the preservation or processing compounds qualitative or natural substances added to food. 23 categories of food additives in Fooding Group Limited, more than 2,000 varieties, including acidity regulator, thickening agent, sweeteners, antioxidants, flavorings, Preservatives, coloring agents, color fixative, enzymes, nutrition enhancers, sweeteners, thickeners, dietary fiber.

There are different definition of food additives in the world, Joint Codex Alimentarius Commission of the Food and Agriculture Organization of the United Nations (FAO) and the World Health Organization (WHO) definition of food additives: Food additives is generally to add a small amount of food to improve food appearance, flavor and organizational structure, or storage of the nature of the non-nutritive substances. According to this definition, food antioxidants to enhance food nutrients should not be included in the range of food additives.