What are Tocopherols?
Tocopherols are natural antioxidants and considered a vitamin e source.

What's their purpose in food?
Their purpose is to slow the oxidation process of fats and oils to ensure its premium pet food products remain fresh as in their initial state. Vitamin E works as a natural preservative for a period of up to 12 months and as a peak preservative up to 6 months. [?]