International Units Per Milliliter (IU/mL)
Current as of: March 28, 2019
Author: Healthwise Staff
Medical Review:Anne C. Poinier, MD – Internal Medicine & Adam Husney, MD – Family Medicine & Martin J. Gabica, MD – Family Medicine
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).