Exosome-based products are increasingly described using billion-count labels. While these numbers appear straightforward, their scientific meaning is often misunderstood.
What Does "10 Billion" Mean? — The preparation contains approximately 10 billion particles within the specified product volume. Total particle count vs. particle concentration are related but not identical.
Are All Particles Exosomes? — Not necessarily. NTA measures particles by size and Brownian motion but does not prove every particle is a biologically defined exosome.
Why Particle Count Matters — Particle concentration is an important quantitative parameter. Vial volume must always be considered alongside the billion-count specification.
How Is Concentration Measured? — NTA is widely used. Other techniques include DLS and electron microscopy.
Billion Count ≠ Quality — Higher particle number does not automatically mean a better product. Quality assessment considers: Size Distribution, Purity, Source and Manufacturing, Stability.
The Counting Method Should Be Specified — Without method information, particle numbers from different manufacturers may not be comparable.
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