Fetal Bovine Serum (FBS) — EU & US Origin | Low Endotoxin, Ultra Low IgG, GMP
Fetal bovine serum (FBS) is the most widely used serum supplement in mammalian cell culture. Collected from bovine fetuses at licensed slaughter facilities, FBS provides a broad spectrum of growth factors, hormones, proteins, and trace elements that support cell growth, attachment, and proliferation across a wide range of cell lines. SeamlessBio supplies FBS in multiple quality grades from certified EU and US origin sources — with full lot documentation, batch reservation, and no minimum order quantity.
FBS Portfolio
| Product | Key Specification | Primary Application | Order |
|---|---|---|---|
| FBS — Low & Very Low Endotoxin | ≤5 EU/mL (Low) ≤1 EU/mL (Very Low) |
General cell culture, primary cells, stem cells, sensitive cell lines requiring low endotoxin background | Order → |
| FBS — Ultra Low IgG & Low IgG | <50 µg/mL IgG (Ultra Low) <200 µg/mL IgG (Low) |
Hybridoma culture, antibody production, immunological assays where endogenous bovine IgG would interfere | Order → |
| FBS — Tet-Free (Tetracycline-Free) | <1 ng/mL tetracycline | Tet-On / Tet-Off inducible expression systems — tetracycline contamination in standard FBS suppresses inducible promoters | Request → |
| FBS — Heat Inactivated | 56°C / 30 min, complement depleted | Complement-sensitive cell lines, immunological assays, primary immune cells where complement activation must be avoided | Request → |
| FBS — Gamma Irradiated | 25–45 kGy gamma | GMP-adjacent manufacturing, highest viral safety requirements, ATMP ancillary material | Request → |
| FBS — ES Cell Pre-Tested | Pre-tested for ES cell pluripotency | Embryonic stem cell culture, iPSC maintenance, pluripotency-sensitive cell lines requiring batch-tested serum | Request → |
Why FBS Quality Grade Matters
Not all FBS is equal. The key differentiators between grades are endotoxin content, IgG content, tetracycline residues, and viral safety treatment. Choosing the wrong grade can directly affect experimental outcomes — endotoxin activates innate immune pathways in sensitive cells, bovine IgG interferes with antibody detection assays, and tetracycline residues suppress inducible promoters in Tet-On/Off systems.
| Quality Parameter | Impact on Cell Culture | Relevant Grade |
|---|---|---|
| Endotoxin (LPS) | Activates TLR4 signalling in macrophages, dendritic cells, primary immune cells — causes false cytokine activation and growth inhibition in sensitive lines | Low Endotoxin ≤5 EU/mL or Very Low ≤1 EU/mL |
| Bovine IgG | Interferes with antibody detection in hybridoma supernatants and ELISA-based assays — reduces signal:noise ratio | Ultra Low IgG <50 µg/mL |
| Tetracycline residues | Suppresses Tet-responsive promoters in Tet-On/Off systems at ng/mL concentrations — standard FBS contains sufficient tetracycline to partially suppress inducible expression | Tet-Free <1 ng/mL |
| Complement proteins | Active complement lyses certain cells in culture — heat inactivation destroys complement activity | Heat Inactivated 56°C/30 min |
| Viral safety | GMP/ATMP manufacturing requires validated viral inactivation — gamma irradiation provides broadest pathogen reduction | Gamma Irradiated 25–45 kGy |
FBS Origins — EU vs US vs Other
| Origin | Regulatory Status | When to Choose |
|---|---|---|
| EU Origin | EU-regulated collection, TSE/BSE monitoring, CEP available | EU regulatory submissions, EMA-aligned documentation, ATMP manufacturing in Europe |
| US Origin | USDA 9CFR licensed facilities, FDA oversight | US regulatory submissions, FDA-aligned documentation, cost-sensitive research applications |
| South American Origin (Uruguay/Brazil) | OIE category — low BSE risk, CEP available for some lots | High-volume manufacturing where cost is primary driver and BSE risk documentation is available |
| Australian/New Zealand Origin | TSE/BSE-free category, highest biosafety profile | Maximum biosafety applications, specific regulatory requirements for BSE-free origin |
Quality & Documentation
| Parameter | Standard |
|---|---|
| Sterility | Sterile filtered 0.1 µm — all lots |
| Endotoxin | Tested per lot — LAL method; grade-specific limits |
| Mycoplasma | Tested — negative |
| BVDV (BVD virus) | Tested — negative (key adventitious agent in bovine serum) |
| Haemoglobin | Tested per lot — ≤20 mg/dL standard grade |
| Growth performance | Cell growth promotion tested per lot on reference cell lines |
| Origin documentation | Certificate of Origin (CoO) with collection country — included with every order |
| Standard documentation | CoA, CoO, MSDS — included with every order |
| GMP documentation | TSE/BSE statement, CEP/ED, 9CFR CoA — on request |
| Volumes | 100 mL, 500 mL, 1 L | Bulk on request |
| Storage | −20°C | Batch reservation up to 6 weeks, free warehousing |
| Min. order | None — free test volumes on request |
Batch Reservation — Why It Matters for FBS
FBS lot-to-lot variability is a known challenge in cell culture. Growth factor concentrations, hormone levels, and protein composition vary between lots — meaning cells adapted to one lot may perform differently on a new lot. SeamlessBio offers batch reservation for up to 6 weeks at no cost: order a small test volume, validate in your cell system, then reserve the entire remaining lot for your project timeline. This eliminates mid-project lot changes and the associated re-validation costs.
View all FBS products in the shop Request a free test volume or batch reservationBulk pricing, lot reservations, GMP documentation: info@seamlessbio.de | +49 851 37932226