Nutrient Unit Conversion Factors

This table provides nutrient conversions from Daily Value (DV) units currently found on the Supplement Facts panel (labeled “old” units) to units consistent with those in the new regulations and the National Academies of Sciences, Engineering and Medicine's Food and Nutrition Board (FNB) Dietary Reference Intake (DRI) values (labeled “new” units). Also present are specialized conversions where some nutrients may have different conversions that are dependent on the source of the nutrient. These conversions are used in the calculator feature of the DSLD so that nutrient amounts currently found on labels using the “old” units can be more readily compared with the “new” labelling units and DRI values for a specific target group.

The units found under the DRI Equivalent Units column will now appear on dietary supplement labels that comply with the current or “new” FDA labeling regulations. The nutrient conversions can also be used to convert and compare amounts found on the “old” labels with those on the “new” labels.

Nutrient Daily Value Units DRI Equivalent Units1
Vitamin A 1 International Unit (IU) = 0.3 Microgram (µg) as retinol activity equivalents (RAEs) for preformed Vitamin A
    = 0.15 Microgram (µg) as retinol activity equivalents (RAEs) for beta-carotene in supplement form
Vitamin D 1 International Unit (IU) = 0.025 Microgram (µg) for cholecalciferol/ergocalciferol
Vitamin E 1 International Unit (IU) = 0.67 Milligram (mg) for d-alpha-tocopherol (natural)
    = 0.45 Milligram (mg) for dl-alpha-tocopherol (synthetic)
Niacin 1 Milligram (mg)
as Niacin Equivalent (NE)
= 60 Milligram (mg) of tryptophan (biosynthesis)
Folate 1 Microgram (µg) folic acid (taken on an empty stomach) = 2 Microgram (µg) in Dietary Folate Equivalents (DFEs)
  1 Microgram (µg) folic acid (taken with food) = 1.7 Microgram (µg) in Dietary Folate Equivalents (DFEs)

1. If the DV units are equivalent to the unit used by the DRI then the nutrient does not appear in the table.

Sources: NLM Site NLM Site

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