Serum

Serum Serum is a component of blood; it is comprised of blood plasma with the fibrinogen removed. It contains neither blood cells nor clotting factors, but includes all other proteins, electrolytes, antibodies, hormones, and other molecular entities in blood. Serum is commonly used in cell culture. It is available from many species types including bovine, canine, chicken, and more. Some serum products are chemically modified for special applications. As with any blood product, the buyer should look for documentation of the product's quality and purity when purchasing.