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).
Primary Medical ReviewerAnne C. Poinier, MD - Internal Medicine
Specialist Medical ReviewerThomas M. Bailey, MD - Family Medicine
Current as ofSeptember 9, 2014
WebMD Medical Reference from Healthwise