Final answer:
Vitamin E, known as a-tocopherol, is an antioxidant found in dietary supplements such as capsules, tablets, and in various foods. It is essential for protecting cells and other vitamins from oxidation. The daily adult requirement is around 10 mg, but excess intake can lead to hypervitaminosis.
Step-by-step explanation:
Vitamin E, chemically known as a-tocopherol, is a fat-soluble vitamin with a unique chromane ring structure and is an essential nutrient known for its role as a potent antioxidant. In terms of dietary supplements, vitamin E is commonly found in softgel capsules, tablets, and liquid forms, and can also be obtained from various food sources including vegetable oils, nuts, seeds, and green leafy vegetables. Its antioxidant properties help protect cells from damage by scavenging free radicals and preventing the oxidation of other vitamins, such as vitamin A. The daily requirement for adults is generally around 10 mg, but it may vary based on factors such as diet, particularly the presence of polyunsaturated fatty acids (PUFA), as well as selenium status in the body. While vitamin E can be beneficial, excessive consumption can lead to hypervitaminosis, with symptoms like nausea, which is particularly concerning given that vitamin E is stored in body fat.