Most foods include enzymes or natural compounds, such as acids or alcohols, that cause them to lose favourable qualities nearly as soon as they are harvested or prepared.
Furthermore, a variety of environmental conditions, including heat and the presence of bacteria, can cause meals to change in ways that are potentially harmful.
The preservation of nutritional properties, the preservation of appearance, and the extension of the period that food can be preserved are the three goals of food preservation.
Traditional preservation methods mainly try to keep out air, moisture, and bacteria, or to create settings where spoilage-causing organisms can’t exist.
Food preservatives are chemical chemicals that are used to protect food from bacteria and fungi.
Chemical food preservatives include sodium benzoate and sodium sorbate.
Final answer:
Hence, food preservatives are chemical chemicals that are used to protect food from bacteria and fungi.
Two such substances are sodium benzoate and sodium sorbate.