Squalene is a natural lipid (triterpene) found, among others, in olive oil, known for its health-promoting and cosmetic properties. It is the main hydrocarbon in virgin olive oil, accounting for over 50% of the unsaponifiable fraction. This compound is also present in human sebum – in humans, squalene makes up about 12% of skin surface lipids, which suggests its important protective role against external factors (e.g., UV radiation)