Unfortunately, most healthcare practitioners and consumers are unaware of the change, and the labeling may not be helpful in communicating the change. However, the label does not provide an equivalent strength in international units, even on the Supplement Facts label. The vitamin D product from Silarx now has a metric strength (left), not an international unit strength (right). The rule also requires listing the absolute amounts of vitamins and minerals in mg or mcg in addition to the percent daily value (% DV) on the label. These changes are based on a US Food and Drug Administration (FDA) final rule, “ Food Labeling: Revision of the Nutrition and Supplement Facts Labels,” published in the Federal Register on (page 33748).
This change also involves OTC solid dosage forms, but it does not include prescription products such as AQUASOL A (water-miscible vitamin A palmitate).
For example, aqueous vitamin D oral drops previously labeled as 400 international units per mL is now labeled as 10 mcg per mL ( Figure 1). You may have noticed changes in the units of measure on the labels of over-the-counter (OTC) fat-soluble vitamins (A, D, and E) from international units (IU) to metric units of measure-micrograms (mcg) or milligrams (mg).
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