Forms
The eight forms of vitamin E are divided into two groups; four are tocopherols and four are tocotrienols. They are identified by prefixes alpha-, beta-, gamma-, and delta-. Natural tocopherols occur in the RRR-configuration only. The synthetic form contains eight different stereoisomers and is called all-rac-α-tocopherol.
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—Joseph Conrad (1857–1924)
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—Ralph Waldo Emerson (1803–1882)
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—Cornelia Otis Skinner (1901–1979)