Preservatives are a class of food additives that inhibit microbial activity and prevent food spoilage.
In order for food to have a certain shelf life, certain measures must be taken to prevent microbial infection and reproduction. Practice has proven that the use of preservatives is one of the most economical, effective and simple ways to achieve the above objectives.
Principle of corrosion protection
The preservative principle of preservatives is roughly as follows:
First, it is an enzyme system that interferes with microorganisms, destroying its normal metabolism and inhibiting the activity of enzymes.
Second, it is to coagulate and denature proteins of microorganisms, and interfere with their survival and reproduction.
Third, it is to change the permeability of the cell serosa, inhibit the elimination of enzymes and metabolites in the body, leading to its inactivation.
When it comes to preservatives, people often think that they are harmful. In fact, they are safe and harmful to the human body. Preservatives are strictly regulated and preservatives should meet the following criteria:
Reasonable use is harmless to the human body;
Does not affect the digestive flora;
Degradable into normal components of food in the digestive tract;
Does not affect the use of drug antibiotics;
No harmful ingredients are produced when the food is heat treated.https://www.china-zhufengchem.com/