Recombinant Human Serum Albumin from Oryza sativa (OsrHSA) is widely used in biopharmaceutical and cell culture applications as a safe and effective alternative to human-derived serum albumin. It serves as a stabilizer and carrier protein in therapeutic formulations, including vaccines, monoclonal antibodies, and recombinant protein drugs, helping to maintain their stability and shelf life. Due to its high purity and low risk of pathogen contamination, OsrHSA is ideal for use in cell and tissue culture, particularly in serum-free and animal-free media formulations for the production of biologics and regenerative medicine products. It is also employed in diagnostic kits and assays requiring a blocking agent or protein supplement. Its plant-based origin makes it suitable for applications where ethical, safety, and scalability concerns limit the use of animal or human-sourced albumin.