What are the hazards of preservatives?

Analysis:

■ What is a preservative? According to experts, preservatives are food additives aimed at maintaining the original quality and nutritional value of food, which can inhibit microbial activities and prevent food from spoilage, thus extending the shelf life.

■ Is preservative harmful to human body? Because the preservatives currently used are mostly synthetic, exceeding the standard will cause certain harm to the human body. Therefore, there are strict regulations on the use of preservatives in China, and it is clear that preservatives should meet the following standards: 1, and reasonable use is harmless to human health; 2, it does not affect the flora of digestive tract; 3. It can be degraded into normal ingredients of food in the digestive tract; 4, does not affect the use of drugs and antibiotics; 5. No harmful components will be produced during food heat treatment.