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  • 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.

Last Updated: Monday, 30th November -0001

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