What is Albumin Creatinine Ratio (ACR)?

ACR is a urine test to see if you have kidney damage. The amount of a protein called "albumin" is measured in your urine, and that amount is divided by the creatinine also found in your urine. Albuminuria (albumin in the urine) means that there is more albumin in the urine than there should be, which is a sign of kidney damage.
What does ACR mean to my health? You should have an ACR test regularly. Why? It helps you know if your kidney function is staying the same or getting worse.