Thermo Scientific HyClone Charcoal/Dextran Treated Fetal Bovine Serum (FBS), U.S. Origin has been shown to be effective in reducing steroid levels for utilization in estrogen-related investigations or receptor studies. Choose cell culture serum with reduced hormone levels that has been assayed pre- and post-treatment to assure treatment efficacy. HyClone Charcoal/Dextran Treated Serum begins with high quality FBS that is then processed to reduce the levels of hormones and growth factors. This serum has been shown to be effective in reducing steroid levels for utilization in receptor studies or estrogen related investigation.