Squalene is a natural organic compound that is found in various plants and animals, including sharks, olives, and amaranth. It is a type of hydrocarbon and is a precursor to sterols, which are important for cell membrane structure. Squalene is often used in cosmetics and skincare products due to its moisturizing properties. In addition to its cosmetic uses, squalene has potential health benefits. It is known for its antioxidant properties and may support the immune system. Squalene is also being researched for its role in vaccines, where it can act as an adjuvant to enhance the body's immune response.