Patient Service Centers
Your kidneys play a significant role in your health by recycling the reusable components in your blood (such as minerals) and by discarding unneeded waste products from your blood through urine. Albumin is a major protein and is one of these unneeded products. When your kidneys are functioning correctly, virtually no albumin should appear in your urine.
This test screens for kidney function problems by calculating your albumin to creatinine ratio (ACR). ACR is calculated by dividing the amount of albumin by the amount of creatinine in the urine. If the ratio shows more albumin in the urine than there should be it may indicate kidney damage.