Common preservatives are sodium metabisulphite and ________.

Preservatives are substances added to food and other products to extend their shelf life by preventing the growth of bacteria, yeasts, and molds that can cause spoilage and foodborne illnesses. Common preservatives include sodium benzoate and sodium metabisulphite. Calcium benzoate, Magnesium benzoate & Nickel benzoate are not food preservatives.