The name liposome is derived from two Greek words: 'Lipos' meaning fat and 'Soma' meaning body.
An artificial microscopic vesicle consisting of an aqueous core enclosed in one or more phospholipid layers.
In other words a liposome is a tiny 'micro' sized bubble or sphere (vesicle) made from a phospholipid (in our case, phosphatidylcholine). This is the same material of which our cell membranes consist. These bubbles can be filled with substances such as Vitamin C, Glutathione or even drugs.
Liposomes have the ability to carry either water or fat-soluble payloads, which makes them an ideal delivery system.