Astor Scientific’s Fetal Bovine Serum – Tetracycline-Free (AS-F0500) is a premium-quality, sterile-filtered serum ideal for sensitive cell culture applications. Sourced from USDA-approved facilities and rigorously tested, this serum is free from tetracycline and other antibiotics. https://www.astorscientific.us/products/fetal-bovine-serum-tetracycline-free-as-f0500