A microscopic spherical vesicle with a membrane consisting of a phospholipid bilayer and an aqueous core that transports drugs or genetic material into cells. In medicine they are used as delivery systems for vaccines, anti-cancer therapy and non-viral gene therapy. In cosmetics liposomes encapsulate active ingredients that are then deposited in the epidermis and dermis. Empty liposomes are also used in skincare where they increase skin humidity.

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