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expressed as ?-tocopherol equivalents (a-TEs). One a-TE is defined by the biological activity of 1 mg (natural) d-?-tocopherol in the resorption-gestation test, which measures the ability to prevent fetal resorption in rats. According to listings by FAO and others ?-tocopherol should be multiplied by 0.5, ?-tocopherol by 0.1, and ?-tocotrienol by 0.3. The IU is converted to aTE by multiplying it with 0.67. These factors do not correlate with the antioxidant activity of

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