Product Education
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.
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A professional-looking website doesn't tell you where an exosome product came from.
Neither does a company calling itself a “lab.”
If you're considering purchasing an extracellular-vesicle product, one of the most important questions isn't simply what's printed on the vial.
It's:
Who actually made this product—and can the seller prove where it came from?
Here are some practical ways to evaluate an exosome company before you buy. These are due-diligence indicators and questions, not a legal or regulatory determination — a single unavailable item doesn't prove a company is illegitimate.
1. Identify the Actual Manufacturer
Start with a simple question:
Who manufactures the product?
The company selling an EV product may be the manufacturer, a distributor, or another type of seller. There's nothing inherently wrong with buying through a distributor.
What matters is transparency.
A legitimate distributor should be able to tell you who manufactures the product rather than creating the impression that it operates a laboratory when it doesn't.
At Express Biologics, we identify KWEHEALTH/HydroKarma as the manufacturer of the HydroKarma products we distribute.
Express Biologics does not manufacture, warehouse or repackage them.
That's intentional transparency.
2. Ask for a Batch-Specific Certificate of Analysis
A Certificate of Analysis, or COA, can provide valuable information about a specific production lot.
Look for information such as:
- lot or batch identification
- particle quantity
- particle-size information
- characterization methods
- EV-associated markers
- protein measurements
- sterility testing
- endotoxin testing
- other applicable finished-product testing
But remember:
Having a document titled “COA” isn't enough by itself. A COA does not by itself establish legitimacy, safety, efficacy, purity, regulatory approval or exosome identity.
The information on it should be meaningful, traceable and understandable.
Read How to Read an Exosome Certificate of Analysis for a deeper explanation.
3. Look Beyond the Biggest Number
“100 billion exosomes.”
“200 billion exosomes.”
Large numbers are easy to advertise.
But ask:
Measured how?
Particle-counting technologies have different measurement principles and limitations, and particle count alone doesn't establish that every detected particle is an exosome.
A legitimate company should be willing to discuss the analytical method supporting its numbers.
A bigger number is not a substitute for better documentation.
See 50 Billion vs. 100 Billion Exosomes: Does a Higher Count Mean Better?
4. Ask Where the Product Comes From
“Exosomes” isn't a biological source.
Ask whether the product is derived from:
- a biological fluid
- cultured cells
- another identified source
Then ask what that source actually is.
If cultured cells are used, questions about cell type, expansion and passage history may become relevant.
According to KWEHEALTH-supplied information, HydroKarma is derived from refined human amniotic fluid rather than cultured-cell expansion.
Understanding the source helps you ask the right manufacturing questions — see Where Do Exosomes Come From? Comparing Common Sources.
5. Be Careful With Vague “Lab Tested” Claims
“Lab tested” sounds reassuring—but what does it mean?
Ask:
- Which laboratory?
- What was tested?
- Which methods were used?
- Were the results lot-specific?
- Can you see the documentation?
A company doesn't necessarily need to publish every proprietary manufacturing detail.
But there is a major difference between protecting legitimate proprietary information and being unable to provide meaningful information about the finished product.
6. Look at Facilities, Manufacturing and Credentials
A legitimate supplier should be able to clearly identify who manufactures the product and where that manufacturing takes place.
Look for concrete information about the manufacturing facility, quality standards, regulatory registrations, inspections and relevant certifications. These details help buyers understand who is actually responsible for producing the product and what manufacturing framework is being followed.
For HydroKarma, KWEHEALTH identifies itself as the manufacturer and provides information about its laboratory, manufacturing operations, FDA-registered facility, cGMP standards and product testing.
These details should be considered alongside the product's biological source, batch-specific documentation, characterization, testing, storage and handling.
7. Look at Storage and Fulfillment
EV products can have specific storage and handling requirements.
Ask:
Who stores the product?
Who packages it?
How is it shipped?
What storage instructions are provided after delivery?
According to KWEHEALTH-supplied information, Express Biologics does not receive, warehouse or repackage HydroKarma. Orders are fulfilled through KWEHEALTH/HydroKarma's cold-chain process.
That creates a direct chain:
KWEHEALTH/HydroKarma → Cold-chain shipment → Customer
For more, see Cold-Chain Storage and Shipping for Extracellular Vesicle Products.
A Legitimate Company Should Welcome Good Questions
Transparency doesn't mean a company will disclose every proprietary manufacturing detail.
It means basic questions about the product shouldn't lead to a dead end.
Before purchasing, you should be able to investigate:
- Who made it?
- Where did it come from?
- What lot am I buying?
- What testing was performed?
- Can I see the documentation?
- How will it reach me?
If those questions repeatedly produce vague answers, that's useful information too.
The Bottom Line
Don't evaluate an exosome company based solely on its website, marketing language or the largest number printed on a vial.
Look for a traceable manufacturer, identifiable biological source, batch-specific documentation, meaningful characterization, finished-product testing and transparent storage and fulfillment information. Planning on Buying Exosomes? Here’s What to Look for Before You Buy and Red Flags to Look Out for When Purchasing Exosomes go further on both.
Express Biologics doesn't manufacture HydroKarma—and we don't pretend that we do.
Our role is to connect customers with HydroKarma products manufactured by KWEHEALTH while making the available product documentation easier to examine.
When you're deciding whom to buy from, transparency should make your questions easier to answer, not harder.
Original Source / References
- U.S. Food and Drug Administration — Public Safety Notification on Exosome Products (content current as of 12/06/2019). Cited for the point that FDA registration or inspection of a facility is not FDA approval or endorsement of any product, company 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 HydroKarma sourcing, characterization, testing, storage and fulfillment. All HydroKarma-specific statements above (refined human amniotic fluid rather than cultured-cell expansion; cold-chain fulfillment by KWEHEALTH/HydroKarma) 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
Red Flags to Look Out for When Purchasing Exosomes
Eight warning signs worth checking before you buy an exosome or extracellular vesicle product — from missing batch COAs to unexplained particle counts and vague manufacturing information.
Planning on Buying Exosomes? Here’s What to Look for Before You Buy
What to look for before buying an exosome product — who manufactures it, where it comes from, what batch documentation supports it, how particle information is characterized, and how it is stored and shipped.
How to Read an Exosome Certificate of Analysis (COA)
A plain-English walkthrough of an extracellular-vesicle Certificate of Analysis: lot numbers, analytical methods, particle concentration, particle size, characterization, specifications and results.
What Is Extracellular Vesicle Purity? How EV Purity Is Evaluated
Extracellular vesicle purity is a multidimensional characterization question, not a single number on a Certificate of Analysis. Here's how particle counts, protein measurements, markers and particle-to-protein ratios each contribute — and what none of them establish alone.