A small amount of protein is excreted daily into the urine of healthy individuals. These extracted proteins are so called mucoproteins, most of which are filtered out of the uriniferous tubules and the glomeruli. Albumin, however, is a protein that is not easily filtered out and is excreted into the urine (microalbuminuria).
Microalbuminuria is a condition characterised by increased urinary excretion of albumin in the absence of overt nephropathy. Microalbumin has been reported in several studies to predict development of diabetic nephropathy and its mortality risk in diabetic patients. Because microalbuminuria may be reversible if diabetes is well controlled, the early detection of Microalbumin can prove very beneficial in treatment programs for diabetes.