Product Education
Buying Exosomes Online: What Should You Look For?
What to check before buying an extracellular-vesicle product online: the actual manufacturer, biological source, batch-specific COA, particle-counting method, and cold-chain shipping.
Buying extracellular-vesicle products online can be surprisingly difficult.
A search can bring up polished websites advertising 50 billion, 100 billion, or even larger particle counts, along with claims about laboratories, manufacturing quality and testing.
But a professional website and an impressive number don't necessarily tell you what you're actually buying.
Before placing an order, here are the things worth checking.
1. Find Out Who Actually Manufactures the Product
The company whose website you're shopping on may not manufacture the product—and that's not necessarily a problem.
Distributors are common.
What matters is whether the relationship is transparent.
Ask:
- Who manufactures the product?
- Is the seller the manufacturer or a distributor?
- Can you identify the actual manufacturing organization?
- Does the documentation match the product being sold?
Be cautious when it's difficult to determine who actually makes the product.
At Express Biologics, we identify KWEHEALTH/HydroKarma as the manufacturer of the HydroKarma products we distribute. Express Biologics does not manufacture or repackage them. How Can You Tell if an Exosome Company Is Legitimate? covers this in more detail.
2. Ask Where the Product Comes From
“Exosomes” isn't a source.
Extracellular vesicles can originate from different biological sources, and different sourcing methods create different manufacturing considerations.
According to KWEHEALTH-supplied information, HydroKarma is produced from refined human amniotic fluid.
Other EV products may be collected from cells grown in culture. In those cases, questions about cell type, expansion and passage history become relevant.
Before buying, you should be able to answer:
What is the biological source of this product?
Learn more in Where Do Exosomes Come From? Comparing Common Sources.
3. Look for a Batch-Specific COA
A Certificate of Analysis can give you information that marketing copy can't.
Ideally, look for documentation connected to an identifiable product lot or batch.
Depending on the product and testing performed, a COA may contain information about:
- particle quantity and size
- analytical methods
- EV-associated markers
- protein measurements
- sterility
- endotoxin
- other finished-product testing
A COA doesn't automatically prove that a product is safe, effective, pure, potent, approved or superior.
But if you're comparing expensive EV products online, being able to inspect batch-specific documentation gives you considerably more information than a product page alone. How to Read an Exosome Certificate of Analysis explains what to look for line by line.
4. Don't Buy Based on Particle Count Alone
This deserves repeating:
100 billion doesn't automatically beat 50 billion.
Ask how the particles were counted.
Ask what else was characterized.
Ask whether the number is connected to batch-specific documentation.
Particle count by itself doesn't establish that every detected particle is an exosome, nor does it establish purity, potency or clinical effectiveness.
A bigger number may be meaningful—but only in context.
See 50 Billion vs. 100 Billion Exosomes: Does a Higher Count Mean Better?
5. Check How the Product Will Be Shipped
Don't wait until checkout to think about shipping.
Ask:
Where is the product stored before your order?
Who packages it?
How is temperature controlled during shipment?
What should you do with it when it arrives?
According to KWEHEALTH-supplied information, HydroKarma products distributed through Express Biologics are fulfilled through the manufacturer's cold-chain process rather than being received, stored or repackaged by Express Biologics.
The product is shipped overnight on dry ice, with shipments going out Monday through Thursday.
Storage and shipping aren't glamorous marketing topics—but they're part of evaluating what you're buying. See Cold-Chain Storage and Shipping for Extracellular Vesicle Products.
6. Read the Claims Carefully
Be cautious when a website promises that an exosome product will treat, cure or reverse a disease or guarantees a particular medical outcome.
Scientific terminology can make marketing sound authoritative.
That doesn't make every claim scientifically established.
The FDA currently states that there are no FDA-approved exosome products.
Also remember:
FDA registration is not FDA approval.
If a company mentions an FDA-registered facility, that statement should not be interpreted as FDA approval or endorsement of the product.
7. Make Sure You Can Ask Questions
Before spending hundreds or thousands of dollars, try asking the seller a few specific questions.
For example:
Can I see the COA?
Who manufactures this?
What's the biological source?
How was the particle count measured?
How will it be shipped?
The quality of the answers can tell you a lot.
A seller may not disclose proprietary manufacturing information, and that's reasonable.
But basic questions about what the product is, who makes it and what documentation supports it shouldn't be impossible to answer.
A Simple Pre-Purchase Checklist
Before buying an EV product online, see whether you can identify:
- Manufacturer
- Biological source
- Lot or batch information
- Certificate of Analysis
- Particle-counting method
- Additional characterization/testing
- Storage requirements
- Shipping method
- Seller/manufacturer relationship
- Appropriate contact information for questions
You don't need to become an extracellular-vesicle scientist.
You just need enough information to make a more informed comparison. How to Evaluate an Exosome Product Before You Buy and Red Flags to Look Out for When Purchasing Exosomes go further.
The Bottom Line
Buying exosome products online shouldn't come down to which website looks best or which company advertises the largest number.
Look behind the marketing.
Find out who manufactures the product, where it comes from, what testing supports the lot, how its particle count was determined, and how the product will be handled before it reaches you.
Then compare products based on the information you can actually verify.
Because when you're buying a sophisticated biological product online, transparency is part of the product.
Original Source / References
- U.S. Food and Drug Administration — Public Safety Notification on Exosome Products (content current as of 12/06/2019). States that “There are currently no FDA-approved exosome products.” Facility registration, inspection or any other regulatory status is not FDA approval or endorsement of a product, manufacturer or distributor.
- Welsh JA, Goberdhan DCI, O'Driscoll L et al. — Minimal information for studies of extracellular vesicles (MISEV2023): From basic to advanced approaches. Journal of Extracellular Vesicles, 2024;13(2):e12404. DOI: 10.1002/jev2.12404 (PMID 38326288). Cited for the recommendation that EV preparations be characterized rather than described by a single particle number alone.
- KWEHEALTH/HydroKarma — manufacturer-supplied documentation for product sourcing, testing, storage and fulfillment. All HydroKarma-specific statements above (refined human amniotic fluid; manufacturer-managed cold-chain fulfillment; overnight shipping on dry ice, Monday through Thursday) are manufacturer-supplied information; they are not findings of the independent publication above or of the FDA, and they do not establish safety or efficacy.
Continue Learning
How Much Do Exosomes Cost? What Actually Determines the Price?
Why extracellular-vesicle product prices vary so widely, and what sourcing, particle measurement, testing, documentation and cold-chain shipping actually contribute to price.
How Can You Tell if an Exosome Company Is Legitimate?
Practical due-diligence questions for evaluating an exosome supplier: who actually manufactures the product, what batch documentation exists, and how storage and fulfillment work.
Red Flags to Look Out for When Purchasing Exosomes
Ten warning signs worth checking before you buy an exosome or extracellular vesicle product — from missing batch COAs to unexplained particle counts and regulatory wording.
How to Evaluate an Exosome Product Before You Buy
Seven practical things to check before buying an exosome product — manufacturer, biological source, batch-specific COA, particle-count method, finished-product testing, cold-chain handling and verifiable claims.