What is the common name for alpha-tocopherol?

Alpha-tocopherol is commonly known as Vitamin E. This form of Vitamin E is an important fat-soluble antioxidant that helps protect cells from oxidative damage and is vital for maintaining healthy skin and eyes, as well as supporting immune function. It plays a crucial role in various biological processes, including inflammation and cellular signaling. The association of alpha-tocopherol with Vitamin E is well established in the field of nutrition and health sciences, making it the correct answer. Other vitamins listed in the options serve different functions and have distinct properties that do not relate to alpha-tocopherol.