Albumin is an amazing polyfunctional protein contributing to homeostasis through mechanisms of hemodynamics, transport and nutrition.Albumin is found both intra and extravascularly in all mammals and many lower vertebrates. It is a molecule of 67 kD, synthesized by the liver. Normally only very trace amounts of albumin escape reabsorption by kidney glomeruli and are excreted into the urine. Many occult diseases can cause kidney damage which may result in excessive amounts of serum proteins, including albumin, to be excreted by the kidney and into the urine.