Donor Horse Serum contains more immunoglobulins than Fetal Bovine Serum and has an increased protein content. It is a cost-effective alternative to Fetal Bovine Serum. Donor Horse Serum involves a controlled collection of the raw serum. In contrast to slaughtered horses, donor horse serum has a lower endotoxin content and exhibits a lower level of batch-to-batch variation. It is used for diagnostic assays, supplementation during mycoplasma growth, or for cultivation of hematopoietic stem cells and neuronal cells.