Miscellaneous Nutrient Information

Calculations and Conversions

Dietary Reference Intakes – Unit Conversion Factors

Folate

1 DFE = 1 μg food folate

Niacin

1 NE = 1 mg niacin 1mg NE = 60 mg tryptophan

Vitamin A

1 RAE = 1 μg retinol = 3.33 IU retinol For preformed vitamin A, 1 RE = 1RAE

Vitamin D

1 μg = 40 IU

Vitamin E

1 IU natural or synthetic Vitamin E = 0.67 mg α-tocopherol equivalent (α-TE) 1 IU synthetic Vitamin E and esters = 0.45 mg α-tocopherol 1 IU natural Vitamin E and esters = 0.67 mg α-tocopherol