Food additives, means to improve food quality and color, flavor and taste as well as anti-corrosion, preservation and processing technology to join the food needs of the synthetic or natural material.Defined as food additives: food additives are generally a small amount of sense to add in food, in order to improve the appearance of food, flavor, or storage of the nature of the organizational structure of the non-nutritive substances. According to this definition, in order to enhance the nutritional composition of food for the purpose of the food additive should not be included in the scope of food additives.Food additives are used to improve food quality, extend shelf life of food for food processing and increasing the food nutrient composition of a class of chemical synthesis or natural material. Food additives can play to improve the quality and nutritional value of food to improve the sensory properties of food to prevent food spoilage, food preservation to extend the period for food processing and improve the utilization of raw materials and so on. At present, China has more than 20 categories, nearly 1000 kinds of food additives, such as acidity regulator, sweeteners, bleaching agents, coloring agents, emulsifiers, thickeners, preservatives, such as nutrition fortifier. It can be said that all processed foods contain food additives. And the rational use of additives on human health and food are deemed useful in food production as long as the national standard by adding food additives, food consumers can be assured.
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