Author: NexaGens Technical Team. Status: published explainer, general industry information — not a claim about any specific NexaGens product. Sources: general pharmaceutical and nutraceutical delivery-system literature on liposome characterization.
In the ingredient supply chain, the word “liposomal” gets applied to a wide range of phospholipid-containing products — some of which are genuinely liposomal, and many of which are not. For a formulator evaluating a delivery-enabled ingredient, understanding which category a product actually falls into affects both label accuracy and expected performance.
What makes a product liposomal
A true liposome is a closed, bilayer (or multilamellar) vesicle formed from phospholipids, with an aqueous core that can encapsulate a water-soluble active, or a bilayer that can hold a lipophilic active. Establishing that a product is liposomal generally requires demonstrating vesicle structure (for example via cryo-electron microscopy, dynamic light scattering for particle size and polydispersity, or freeze-fracture imaging) and characterizing the relationship between the active ingredient and the vesicle — is it encapsulated, embedded in the bilayer, or simply associated with the exterior?
What “phospholipid-coated” or “emulsified” usually means
Many commercial powders described as liposomal are more accurately phospholipid-coated particles, emulsions stabilized with phospholipids, or spray-dried matrix systems that use lecithin or similar phospholipids as a processing aid rather than a true vesicle-forming structure. These can still offer real formulation benefits — improved dispersibility, better powder handling, reduced surface oxidation — but they are a structurally different product and should be labelled accordingly.
Why the distinction matters for formulators
Mislabeling a phospholipid-coated powder as “liposomal” creates two risks: it sets performance expectations (encapsulation efficiency, protection, potential absorption behaviour) that the actual structure may not support, and it exposes the finished-product brand to a claims-substantiation gap if challenged. When evaluating a supplier ingredient, ask for the structural evidence, not just the marketing term.
NexaGens uses the word “liposomal” on its own product pages only where the underlying structural evidence supports it; where a product is phospholipid-coated, emulsified or matrix-protected rather than a true liposome, the site uses the more accurate technical description.