Lecithin is one of the most important components of cells and plays an important role on its metabolism, especially on its constituency and membrane penetration. It has also been used as a bio-surfactant in cosmetics for a long time. However, its application to cosmetics was limited because of its oxidation and instability against heat. Hydrogenated Lecithin has all the good qualities of natural lecithin, yet its stability is greatly improved. Moreover, it can be used in new formulations which lecithin could not be used in the past.