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Vitamin E: Vitamin E exists in eight different forms ("isomers"): alpha, beta, gamma, and delta tocopherol; and alpha, beta, gamma, and delta tocotrienol. Alpha-tocopherol is the most active form in humans. Vitamin E has been proposed to have a role in preventing or reversing atherosclerosis by inhibiting oxidation of low-density lipoprotein ("bad cholesterol"). The effects of vitamin E on cholesterol levels and atherosclerosis have been studied in numerous laboratory, population, and clinical studies. It remains unclear if there are clinically meaningful benefits, and it is not known what the effects of vitamin E are compared to (or in combination with) other agents that have been clearly demonstrated as beneficial for lowering lipid levels. Further research is warranted before a clear conclusion can be made.Natural Standard Monograph, Copyright © 2008 (www.naturalstandard.com).
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