– Human Serum Albumin (HSA) is the most abundant protein in human plasma, is produced in the liver and is water soluble, with a molecular weight of 66.5 kDa. HSA inhibits Alzheimer’s disease by selectively binding to cross-structured A oligomers. HSA is a key endogenous inhibitor of amyloid-β (Αβ) aggregation. HSA is used as a carrier protein in cell culture for the transport of fatty acids, steroids, and thyroid hormones and to regulate osmolality of the blood, and is also used in drug delivery studies, immunoassays, and cell freezing. cell freezing.