Squalene (Squalene), also known as squalene, is triterpenoids an open chain. Because originally been extracted from shark liver oil, so named squalene. Then find sharks and other fish eggs oil also contain it, and now it's found to be widely distributed than many expected, fungi and human earwax contains a small amount.

Squalene mainly present in the unsaponifiable portion of shark liver oil, in small amounts in olive oil, rice bran oil, wheat germ oil, yeast and human fat. It has a presence in a variety of shark liver, with the highest concentrations of deep-sea shark liver oil
Squalene erythrocytes having similar functions as oxygen uptake, generating an activated oxide squalene, transport in the blood circulation to the body end of the cells release oxygen, thereby enhancing the ability to use body tissue of oxygen, strengthen liver function. Squalene has the penetration, diffusion and sterilization, human skin sebum secretions often contain squalene and sterols in order to maintain the skin soft and smooth.