Throughout the body, vitamins serve crucial functions to maintain cells in a state of health. Perhaps unimaginatively named for the letters of the alphabet, the vitamins are A, B, C, D and E. Vitamin K breaks the order but is no less important. A recent conversation with a fellow veterinarian led me to review the function of vitamin E in animals and I thought I would share what I learned. Vitamin E in animals serves as an antioxidant in conjunction with the mineral selenium. Routine cell functions that use energy to move molecules around generate a great deal of waste.