Dairy whey protein is typically a mixture of beta-lactoglobulin (65%), alpha-lactalbumin (25%), bovine serum albumin (8%) (see also serum albumin), and immunoglobulins.
Low albumin (hypoalbuminemia) may be caused by liver disease, nephrotic syndrome, burns, protein-losing enteropathy, malabsorption, malnutrition, late pregnancy, artefact, genetic variations and malignancy.