Exosome-Depleted Fetal Bovine Serum
Exosome-depleted fetal bovine serum (FBS) is processed to reduce endogenous bovine extracellular vesicles. This helps minimize contamination that can compromise exosome isolation assays while maintaining the growth-promoting environment your cell culture depends on.
Free Exo-FBS samples are available for qualified research projects. Apply to discuss your application requirements and volume needs with our team.
What Is Exosome-Depleted FBS?
Exosome-depleted FBS is fetal bovine serum that undergoes specialized processing to remove most endogenous bovine extracellular vesicles. These vesicles, primarily exosomes and microvesicles, typically fall within the 30–200 nm size range and are naturally present in standard serum.
Using exosome-depleted FBS helps address extracellular vesicle contamination at the media level, before isolation begins.
Benefits of Exosome-Depleted FBS:
Eliminates Bovine Exosome Contamination
Preserves Growth-Promoting Properties
Improves Data Integrity
Stringent Sterile Filtration
Reproducible Lot-to-Lot Consistency
Regulatory Compliance
Why Standard FBS Interferes With Exosome Isolation
Standard FBS contains a substantial concentration of bovine-origin extracellular vesicles. When exosomes are isolated from cell-conditioned media, whether by differential ultracentrifugation, size-exclusion chromatography, or precipitation kits, bovine vesicles present in the serum supplement co-purify with your target exosomes. Because they share the same physical characteristics, this contamination is difficult to remove at the isolation stage.
Particle counting by NTA or flow cytometry will overestimate yield. Proteomic and lipidomic profiles of the exosome fraction will include bovine proteins and lipids. Western blot data for canonical exosome markers will be obscured. If your cell culture media contains standard FBS, your exosome data contains bovine vesicle contamination.
Exosome-depleted FBS is the accepted solution for this contamination problem across exosome research applications.
What Research Applications Require Exosome-Depleted FBS?
Many research workflows involving the isolation, characterization, or functional study of extracellular vesicles from cell-conditioned media use exosome-depleted serum as the culture supplement. Compatible applications include:
Extracellular vesicle (EV) proteomics and lipidomics
Cancer biology and tumor-derived exosome research
MicroRNA (miRNA) & small RNA cargo analysis from EVs
Intercellular communication and signaling studies
Exosome-based biomarker discovery and validation
Drug delivery and therapeutic exosome research
Stem cell-derived exosome research
Exosome-Depleted FBS Product Specifications
SeraPrime: Your Source for High-Quality, Exosome-Depleted FBS
At SeraPrime, we deliver exosome-depleted FBS that meets the precise requirements of extracellular vesicle research. Every lot undergoes rigorous quality control, triple 0.1µm sterile filtration, and full documentation, so your isolation assay starts with a clean baseline.
Whether you are conducting exosome characterization, EV-based biomarker studies, or therapeutic vesicle research, SeraPrime provides the consistency, traceability, and responsive service your lab requires.
Frequently Asked Questions
For more commonly asked questions about Fetal Bovine Serum, visit our Resources page or read our FBS FAQ guide.
Does exosome depletion affect cell growth performance?
Exosome-depleted FBS supports normal cell growth for most standard cell lines. Depletion removes extracellular vesicles but does not remove the proteins, growth factors, or nutrients responsible for cell proliferation and viability.
As with any specialty serum, SeraPrime recommends lot-testing against your specific cell lines before committing to a full order.
How is the exosome depletion performed?
SeraPrime’s exosome-depleted FBS is processed using validated methods that remove particles in the exosome size range (30–200 nm). Processing is performed under sterile conditions in ISO 13485-certified facilities, followed by triple 0.1µm sterile filtration before final packaging.
Lot-specific processing data is available on the Certificate of Analysis.
Is exosome-depleted FBS available with heat inactivation or gamma irradiation?
Yes. Exosome-depleted FBS is available with heat inactivation and gamma irradiation upon request. Custom volumes from 50 mL to bulk quantities are available. Contact SeraPrime to discuss your application requirements and confirm availability and lead time.
How does exosome-depleted FBS compare to serum-free media for exosome research?
Serum-free media eliminates bovine exosome contamination entirely but can compromise cell viability for many cell lines and requires full protocol re-validation. Exosome-depleted FBS is the practical middle ground: it removes the contaminating bovine vesicles while preserving the growth-promoting environment most protocols depend on. For cell lines that tolerate serum-free conditions, both approaches can be valid. The right choice depends on your cells and assay requirements.
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