Food additives refer to artificial or natural substances added to food to improve the quality of food such as color, aroma and taste and meet the needs of preservation and processing technology. Such as acidity regulator, anti-caking agent, defoamer, antioxidant, etc. It is used for preventing deterioration, improving senses, maintaining nutrition, and facilitating supply and processing.

1, to prevent spoilage. For example, preservatives can prevent food spoilage caused by microorganisms, extend the shelf life of food, and prevent food poisoning caused by microbial contamination.

2. Sensory improvement and correct use of food additives such as colorants, color fixatives, bleaches, flavoring agents, emulsifiers and thickeners can obviously improve the sensory quality of food.

3. Maintain nutrition, and properly add some food nutrition enhancers that belong to the natural nutrition range in the food processing process, which can greatly improve the nutritional value of food.

4. Convenient supply. In some food production projects, food additives such as pigments, flavoring agents and seasonings are added to varying degrees, which greatly facilitates the supply of food.

5. The processing is convenient, and the use of defoamer, filter aid, stabilizer and coagulant in food processing can be beneficial to food processing operations.

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