What “exosome” means on a label

In the research literature, “exosome” names a vesicle with a specific origin. It forms inside the cell’s endosomal system and is released when that compartment fuses with the cell surface. For most samples, that origin can’t be demonstrated, and a preparation usually holds vesicles that formed by more than one route.

So the field’s own guidelines, MISEV2023 from the International Society for Extracellular Vesicles, recommend the general term “extracellular vesicle,” or EV, unless endosomal origin has been shown.

For a brand, this matters in one practical place. “Exosome” on the front of the box is the category’s word, and buyers know it. Inside your documents, the claim that holds up names the source, the method and what was measured.

We use “exosome” when we talk about the market, because it’s the word on the shelf. Our reports use “extracellular vesicle,” as MISEV2023 recommends.