Urine Albumin Test (Microalbumin / ACR)
A urine test that detects small amounts of protein, an early sign of kidney damage, especially in diabetes.
Quick Summary
To screen for kidney damage in diabetes and high blood pressure, and assess protein loss.
Albumin-to-creatinine ratio (ACR).
An early-morning sample is preferred; avoid heavy exercise beforehand.
Overview
People with diabetes should have this test at least yearly.
Raised levels should be confirmed with repeat tests.
What It Measures
ACR
Albumin compared with creatinine.
How It's Performed
- 01
Clean catch
Wash your hands and genital area.
- 02
Midstream sample
Pass a little urine into the toilet, then collect the middle part in the sterile container.
- 03
Hand in
Close the lid and return it promptly.
Reference Ranges
Note: Normal ranges vary by laboratory. Consult your report for the specific reference used.
| Parameter | Typical Range (Adult) | Units |
|---|---|---|
| ACR (normal) | Below 30 | mg/g |
Interpreting Results & Next Steps
Discuss with Doctor
Your doctor will explain what your result means and what happens next.
If values are High:
Raised ACR suggests kidney damage; treatment aims to protect the kidneys.
Sources and further reading
Last updated 21 October 2026. For more detail, see these trusted health organisations.
- Microalbumin Creatinine Ratio(opens in a new tab) · MedlinePlus, US National Library of Medicine
- Urine albumin to creatinine ratio (ACR)(opens in a new tab) · NHS