What is a liposome?
The liposome is a small, ultra-structured spherical matrix. It is composed of a concentric bilayer of phospholipids. The phospholipids, formed from a glycerol linked to two fatty acids and a phosphate group, are amphiphilic lipids.
Consisting of a polar head (the glycerol, affinity with water) and two apolar tails (the fatty acids, affinity with the lipids), this characteristic gives them the possibility of organising themselves in a circular manner when placed under precise and well-controlled conditions in an aqueous medium.
The micro-vesicles thus formed will then trap an aqueous compartment and remain in suspension in the solution containing them.
The liposome allows the encapsulation of hydrophilic actives in its core or lipophilic actives in the apolar central space of the phospholipid bilayer.