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Presented for research literature review only Wu YQ et al
The unit conversions are as follows: Natural vitamin E ( --tocopherol) containing supplements: RRR IU of RRR --tocopherol x 0.67 = mg of RRR --tocopherol Example: 100 IU of natural vitamin E provides 67 mg of RRR --tocopherol Synthetic vitamin E ( all - rac --tocopherol) containing supplements: IU of all - rac --tocopherol x 0.45 = mg of RRR --tocopherol Example: 100 IU of synthetic vitamin E provides 45 mg of RRR --tocopherol -Tocopheryl esters -Tocopheryl succinate and -tocopheryl acetate are the main esterified forms of vitamin E in nutritional supplements
Thus, inherited glutamine synthetase deficiency specifically affects the synthesis of NAD + from the NAD + precursors, tryptophan and nicotinic acid
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