The results produced in this work confirmed that the mechanism of liposome formation in SuperLip, can be related to the favorable interactions between the expanded liquid-phospholipid mixture and the atomized water droplets. This mechanism is also at the basis of the successful encapsulation of BSA into liposomes. Indeed, if aqueous droplets are rapidly surrounded by a layer of the lipids dissolved in the expanded liquid, these droplets, form a w/CO2 emulsion and liposomes (w/w emulsion) are formed when they fall in the water pool located at the bottom of the vessel. The process is very fast thanks to the large mass transfer coefficients that characterize supercritical mixtures. In this way, all the compounds dissolved in the water solution are efficiently entrapped inside the liposomes with a very high encapsulation efficiency, differently from the generality of the processes until now proposed. This is the most relevant result of this work, that confirms the potential of SuperLip in producing, in an efficient and reliable manner, therapeutic liposomes. Furthermore, thanks to the possibility to operate at mild temperature conditions it is possible to encapsulate thermosensitive compounds, like proteins, preserving their functionality.