The body's most intelligent messengers. Understanding the science behind cellular communication and regeneration.
Exosomes are nano-sized extracellular vesicles — tiny lipid membrane bubbles secreted by virtually every cell in the human body. Ranging from 30 to 150 nanometres in diameter (smaller than any bacterium, invisible to the human eye), they were once dismissed as cellular waste. We now know they are among the body's most sophisticated communication tools.
Each exosome is a biological package carrying a precise cargo of:
When an exosome fuses with a target cell membrane, it delivers this cargo directly into the cell's cytoplasm — effectively reprogramming the recipient cell's behaviour.
The journey of an exosome from source cell to target cell follows a precise biological sequence:
Formed inside multivesicular bodies within the source cell.
Released into the extracellular space upon MVB fusion with the cell membrane.
Surface proteins guide exosomes to specific target cell types.
Cargo is released into target cell, reprogramming its biological response.
| Factor | Exosomes | Stem Cells | PRP |
|---|---|---|---|
| Cell-free | ✓ Yes | No — living cells | ✓ Yes |
| Immune rejection risk | None | Possible | None (autologous) |
| Tumour risk | None | Theoretical risk | None |
| Standardised potency | Yes | Variable | Variable by patient |
| Blood-brain barrier crossing | Yes | Limited | No |
| Regulatory complexity | Lower | High | Lower |
The biological potency of an exosome is determined entirely by the cell that produces it. A young, primitive, pluripotent cell produces exosomes with a far richer regenerative cargo than an aged adult cell. This is why iPSC — induced pluripotent stem cells — represent the gold standard source.
Read our full explanation of iPSC technology and why it matters, or see our iPSC vs MSC comparison on the homepage.
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