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    Vitamin IU to mg/mcg Conversion Guide

    vitamentor.com/convert-iu-to-mg-or-mcg-with-our-easy-calculators-for-vitamins-a-d-and-e/

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    General Information
    • Conversion calculator available for US and Canada only
    • Values may vary by country
    • Information provided for consumer education only
    Vitamin A Conversion
    • RAE (retinol activity equivalent) is new vitamin A unit
    • IU to mcg RAE: multiply by 0.3
    • Example: 3000 IU A converts to 900 mcg RAE
    Vitamin D Conversion
    • IU to mcg: divide by 40
    • FDA allows IU in parentheses on supplement facts panel
    Vitamin E Conversion
    • Synthetic form (dl-alpha): multiply by 0.45
    • Natural form (d-alpha): multiply by 0.67
    • Example: 400 IU E converts to 180 mg or 268 mg
    Folate Conversion
    • DFE (dietary folate equivalent) better equates food vs synthetic folate
    • Divide mcg folic acid by 0.6
    • Example: 400 mcg folic acid converts to 667 mcg DFE
    Daily Values
    • Adult values: 900 mcg RAE for A, 20 mcg for D, 15 mg for E
    • Pregnant/lactating women: 1300 mcg RAE for A, 15 mcg for D
    • Children 1-3 years: 300 mcg RAE for A, 15 mcg for D
    • Infants 1-12 months: 500 mcg RAE for A, 10 mcg for D

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