Albumin is a large molecule protein found in the blood, under normal circumstances it does not pass into the urine. If albumin occurs in the urine it could indicate infection of the urinary tract, kidney damage as in nephritis and toxemia in pregnancy. A urine for albumin test is a screening test to look for the presence of albumin in the urine .An albumin test cheeks urine for a protein called albumin for urine . Albumin is normally found in blood and filtered by kidneys. When the kidneys are working as the slow, there may be very small amount albumin in the urine .But when the kidneys are damage ,abnormal amounts of albumin leaks in the urine. This is called albuminuria.