Thermo Scientific HyClone Standard Fetal Bovine Serum (FBS), U.S. origin, is highly filtered and meets virus testing requirements.HyClone Standard Fetal Bovine Serum is filtered through serial 100nm (0.1µm) pore-size filters and processed using ìTrue Poolì processing technology to ensure consistency in the quality of serum. Standard HyClone FBS is widely used by professionals requiring an extensive biochemical profile and full traceability compliant with current Good Manufacturing Practices (cGMP).