Potassium sorbate is a preservative that inhibits microbial activity and is used as a food preservative. Potassium metabisulfite is an antioxidant. The sulfur dioxide produced by decomposition can slow down the oxidation process of red wine. Potassium metabisulfite is used as a food bleaching agent, preservative and antioxidant.

Sorbic acid is widely used in low alcohols such as fruit wines, beers and wines and is ideal for preservation. In view of the limitations of single food additives in terms of application and physical properties, there is a great deal of effort at home and abroad to develop complex food additives that can be synergized to achieve optimal results.

Extended information:

Some preservatives are completely harmless to people. Carbon dioxide, for example, is added to carbonated beverages and beer during the production process, not only to increase the mouth-killing power of drinking and make people feel very cool, but also to inhibit the growth of aerobic microorganisms.

A few preservatives have been questioned for their toxicity, such as benzoic acid and its sodium salt, p-hydroxybenzoic acid esters, dehydroacetic acid, etc., and are gradually being replaced by sorbic acid and its salts, propionic acid and its salts.

Some other preservatives are not only safe, but can also make up for a certain nutrient deficiency in the body. For example, sorbic acid, which is an unsaturated fatty acid, can participate in the body's normal metabolism, the product is carbon dioxide and water, harmless to the human body, but the price is relatively expensive compared to the previous three preservatives.

Again, for example, propionic acid and its salts, calcium propionate and other fats can be metabolized through the same by the human and animal absorption, and supply of human and animal essential calcium, for those who always buy calcium tablets, in the market when shopping for commodities, you can choose to add calcium propionate the kind of calcium preservative supplement both.

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