Test
- The albumin-creatinine ratio (ACR) test is used to see how well your kidneys are working.
- It does this by measuring the level of a protein called albumin in your urine.
- Normally, your kidneys should filter almost all albumin from your urine.
- If your kidneys are damaged, they allow too much albumin to pass through.
- The test also measures creatinine another substance filtered by your kidneys.
- An ACR test compares the amount of albumin to the amount of creatinine. This is a more accurate way to measure the amount of albumin in your urine than using albumin alone.