platelet-rich plasma

Human platelet lysate is a substitute supplement for fetal bovine serum (FBS) in experimental and clinical cell culture. It is a turbid, light-yellow liquid that is obtained from human blood platelets after freeze/thaw cycle(s). The freeze/thaw cycle causes the platelets to lyse, releasing a large quantity of growth factors necessary for cell expansion. hPL has the highest concentration of growth factors of any serum supplements. FBS-free cell culture media, e.g. with platelet lysate or chemically defined/ animal component free, are used for cell therapy or regenerative medicine. They are commercially available in GMP -quality which is generally basis for regulatory approval. — Wikipedia