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Food additives are substances added to food, aimed to preserve flavor or improve taste and appearance of food. Preservatives food additives are anti-microbial preservatives, which inhibit the growth of bacteria and fungi, or antioxidants such as oxygen absorbers, which inhibit the oxidation of food constituents. Therefore, many manufacturers add preservatives into food to prolong products shelf life. However, there are strict regulations on addition of preservatives. In this article, we will talk about some other ways to prolong pet food shelf life in terms of pet food packaging.