Preservatives are added to ensure pet food remains wholesome and nutritious during distribution and storage.1
Fats and fat-soluble vitamins are the critical nutrients that require preservation during the manufacturing process and storage.
Preservatives or antioxidants can be categorised into two basic types: natural antioxidants that are derived from nature and synthetic (or manufactured) antioxidants.2
1. Case LM, Daristotle L, Hayek MG, Raasch MF. Nutrient content of pet foods. In: Case LM, Daristotle L, Hayek MG, Raasch MF, eds. Canine and Feline Nutrition. 3rd ed. Maryland Heights, MO: Mosby Elsevier; 2011:141–162.
2. Wortinger A. Nutritional myths. J Amer Anim Hosp Assoc. 2005;41:273–276.
3. Aldrich G. Ingredient Myths That Have Altered the Course of Pet Food: Byproducts, Synthetic Preservative and Grains. Nestlé Purina Companion Animal Nutrition Summit; 2013;10–19.