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International Units Per Milliliter (IU/mL)

An international unit is an arbitrary amount of a substance agreed upon by scientists and doctors. A milliliter is a measure of volume that is equal to one-thousandth of a liter (or slightly less than a quarter of a teaspoon).

Some medical tests report results using international units (IU) per milliliter (mL).

Last Revised: May 10, 2013

Author: Healthwise Staff

Medical Review: Anne C. Poinier, MD - Internal Medicine & Thomas M. Bailey, MD - Family Medicine

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