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D-alpha Tocopherol is a yellow to brownish red,clear oily liquid, nearly odorless, and is a monomer of the natural vitamin E derived from edible vegetable oil. Usually, it is produced by methylation and hydrogenation of natural mixed vitamin E, and retains its original conformation. Alpha tocopherol can be used as high-abundance ratios of natural tocopherol supplements in liquid functional foods and ordinary foods.