Preservatives refer to food additives used in food, which are used to prevent the deterioration of food caused by microbial reproduction during storage and circulation, or the deterioration of internal quality and color of food caused by poor storage and sales conditions, so as to improve the shelf life and prolong the edible value. For a long time, food preservatives have a lingering shadow in people's minds, that is, all preservatives are harmful to human health. This view is completely wrong and should be evaluated correctly now.

Preservatives refer to food additives used in food, which are used to prevent the deterioration of food caused by microbial reproduction during storage and circulation, or the deterioration of internal quality and color of food caused by poor storage and sales conditions, so as to improve the shelf life and prolong the edible value. For a long time, food preservatives have a lingering shadow in people's minds, that is, all preservatives are harmful to human health. This view is completely wrong. Now we should evaluate them correctly and give them enough attention.