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What It Is. A microalbumin-to-creatinine ratio urine test involves measuring the amount of a protein called albumin in the urine (pee). The amount of urine albumin is compared with the quantity of a waste product in the urine called creatinine.
Quick Answer. The normal range for a random urine microalbumin test is less than 30 milligrams, says Mayo Clinic. Microalbumin is a blood protein filtered by the kidneys. The urine test measures the amount of protein unfiltered by the kidneys and is used to detect early signs of kidney damage. Continue Reading.