Milliunits per liter (mU/L)
Some medical tests report results in milliunits per liter (mU/L).
- A unit is a standard of measurement, and a milliunit is one-thousandth of a unit.
- A liter is a measure of volume that is a little bigger than a quart of fluid.
Current as of: May 1, 2026
Author: WebMD Ignite Staff
Clinical Review Board
All WebMD Ignite education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.