An international unit is an arbitrary amount of a substance agreed
upon by scientists and doctors; a liter is a measure of volume that is slightly
greater than a quart.
Some medical tests report results using international units (IU)
per liter (L).
Author:
Jeannette Curtis Caroline Rea, RN, BS, MS
Last Updated: May 25, 2007
Medical Review:
Patrice Burgess, MD - Family Medicine Adam Husney, MD - Family Medicine Kathleen Romito, MD - Family Medicine