Argan oil is easily absorbed by the skin because of its unique composition. Squalene can penetrate deeper and more readily than most other oils because of its compatibility with the skin’s own natural oils. Human sebum, the skin’s own natural oil, is comprised of 25% squalene. Sterols found in argan oil penetrate rapidly because their structure is very similar to the human sterols that are the main component of the outermost layer of the skin. Essential fatty acids are the building blocks of the cell membrane and therefore, can be metabolized and directly assimilated into the skin.