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Learn About Exosomes
Compare exosome products, explore what published research is finding, or go deeper into extracellular vesicle science.
Buying & Product Guides
Buying Exosomes? Start Here
Understand what to look for when comparing exosome products, suppliers, testing, particle counts, Certificates of Analysis, sourcing and shipping.
Buying Exosomes? Here’s What to Look For
Learn how to compare sourcing, testing, particle counts, COAs and supplier transparency before choosing a product.
Red Flags to Look Out for When Purchasing Exosomes
Know the warning signs before choosing a product or supplier.
Are All Exosome Products the Same?
See how sourcing, testing, manufacturing and handling can differ.
50 Billion vs. 100 Billion Exosomes: Does a Higher Count Mean Better?
Understand why a bigger particle number doesn't automatically mean a better product.
What Should Be on an Exosome Certificate of Analysis?
Learn what meaningful batch documentation should actually show.
What Questions Should You Ask an Exosome Supplier Before Buying?
Seven practical questions to ask before placing an order.
Exosome Research
Explore What Exosome Research Is Finding
Explore what published studies are reporting about extracellular vesicles in areas such as hair loss, skin aging, joint health and other topics being investigated.
Can Exosomes Help With Hair Loss? What the Research Says
See what human studies and systematic reviews have reported about extracellular vesicles, hair density, hair growth and androgenetic alopecia.
Do Exosomes Help With Skin Rejuvenation and Wrinkles? What the Research Says
Explore human research involving extracellular vesicles, wrinkles, hydration, elasticity, pigmentation and skin appearance.
Can Exosomes Help With Knee Pain?
Explore what human and preclinical research is reporting about extracellular vesicles, knee osteoarthritis, pain, joint function and cartilage biology.
Can Exosomes Help With Rotator Cuff & Tendon Injuries?
Explore what published research is finding about extracellular vesicles, rotator cuff repair, tendon healing and the tendon-to-bone interface.
Research summaries discuss published studies and should not be assumed to describe or establish the performance of products offered by Express Biologics. Study materials, manufacturing methods, concentrations, routes of administration, models, and populations may differ.
Exosome & EV Science
Explore the Science
Go deeper into extracellular vesicles, characterization, particle measurement, sourcing, manufacturing, testing, storage and other technical topics.
What Are Exosomes? A Beginner's Guide
Start here for a plain-English introduction to what exosomes are.
Exosomes vs. Extracellular Vesicles: What's the Difference?
Understand the terminology used across labels, COAs and research.
How Are Exosomes Produced and Processed?
See how exosome products are sourced, processed and prepared.
Understanding Exosome Concentration and Particle Count
Learn what concentration and particle count actually describe.
Understanding Extracellular Vesicle Characterization and Testing
How laboratories confirm what is in a batch, and with which methods.
How to Read an Exosome Certificate of Analysis (COA)
Walk through a Certificate of Analysis line by line.
Deeper Technical Topics
Ready to Go Deeper?
Explore the complete collection of technical guides by topic.
Looking for Something Specific?
Search the complete Express Biologics Learning Center.
Browse All Learn Articles
Every published guide and research summary in the Express Biologics Learning Center.
Exosomes & EVs
- What Are Exosomes? A Beginner's Guide
- Exosomes vs. Extracellular Vesicles: What's the Difference?
- How Are Exosomes Produced and Processed?
- Understanding Exosome Concentration and Particle Count
- What Is Extracellular Vesicle Size and Why Does It Matter?
- What Is Extracellular Vesicle Concentration vs. Total Particle Count?
Quality, Testing & COAs
- Understanding Extracellular Vesicle Characterization and Testing
- How to Read an Exosome Certificate of Analysis (COA)
- What Are CD9, CD63 and CD81? Understanding Common Extracellular Vesicle Markers
- What Is Extracellular Vesicle Purity? How EV Purity Is Evaluated
- What Is Zeta Potential and Why Is It Measured?
- What Is Extracellular Vesicle Morphology and How Is It Evaluated?
- What Is Extracellular Vesicle Protein Content and Why Is It Measured?
- What Is the Particle-to-Protein Ratio in Extracellular Vesicles?
- How Are Extracellular Vesicle Particle Counts Measured?
- What Is Endotoxin Testing and Why Does It Matter?
- What Is Sterility Testing? Understanding “No Growth” on a COA
- What Is Osmolality and Why Is It Measured?
- What Is Particulate Matter Testing? Why a Product Can Contain Billions of EVs and Still Report 0 Particles
- What Does “0 Cells/mL” Mean on an Extracellular Vesicle COA?
Manufacturing & cGMP
- What Does cGMP Mean? A Beginner's Guide to Manufacturing Quality
- What Is Aseptic Processing? A Beginner's Guide to Contamination Control
- What Is Extracellular Vesicle Isolation and Purification?
- What Is Extracellular Vesicle Yield and Recovery?
- What Does Cell Passage Number Mean in Exosome Manufacturing?
Storage & Cold Chain
Product Education
- How to Evaluate an Exosome Product Before You Buy
- Red Flags to Look Out for When Purchasing Exosomes
- Exosomes vs. PRP: What's the Difference?
- 50 Billion vs. 100 Billion Exosomes: Does a Higher Count Mean Better?
- Where Do Exosomes Come From? Comparing Common Sources
- Amniotic Fluid vs. Cultured-Cell Exosomes: What's the Difference?
- How Can You Tell if an Exosome Company Is Legitimate?
- Buying Exosomes Online: What Should You Look For?
- How Much Do Exosomes Cost? What Actually Determines the Price?
- Liquid vs. Lyophilized Exosomes: What's the Difference?
- What Should Be on an Exosome Certificate of Analysis?
- How Do You Know if an Exosome Product Actually Contains Exosomes?
- What Questions Should You Ask an Exosome Supplier Before Buying?
- Are All Exosome Products the Same?
Looking for documented product quality information? See our quality standards →