To explain it simply, mixed tocopherols are a combination of different sources of Vitamin E. They can be a mixture of alpha-tocopherol, beta-tocopherol, gamma-tocopherol, and delta-tocopherol, which are all natural forms of Vitamin E. Tocopherols do differ very slightly in chemical structure, but are essentially the same. They’re usually sourced from nuts, seeds, healthy oils, and even spinach.
Surprisingly, the reason Vitamin E is found in so many pet products isn’t because of its health benefits; mixed tocopherols are an exceptionally effective preservative. Over the last couple of decades, pet product manufacturers have been meeting an increasing demand for all-natural, healthy pet foods and treats. Part of this trend has been the removal of unwanted synthetic preservatives.